SELECT 
  products.company_id as variant_id, 
  company_descr.i18n_company as variant 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_company_descriptions as company_descr ON company_descr.company_id = products.company_id 
  AND company_descr.lang_code = 'en' 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_warehouses_sum_products_amount as war_sum_amount ON war_sum_amount.product_id = products.product_id 
  LEFT JOIN cscart_product_prices AS opt_prices ON opt_prices.product_id = products.product_id 
  AND opt_prices.lower_limit > 1 
  AND opt_prices.usergroup_id IN (0, 1) 
  LEFT JOIN cscart_product_prices AS abt_normal_prices ON abt_normal_prices.product_id = products.product_id 
  AND abt_normal_prices.lower_limit = 1 
  LEFT JOIN cscart_sg_old_product_sell as sop ON sop.product_id = products.product_id 
WHERE 
  1 = 1 
  AND cscart_categories.category_id IN (403) 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND products.product_type != 'D' 
  AND (
    sop.old_product_only = "Y" 
    OR sop.old_product_only IS NULL
  ) 
GROUP BY 
  products.company_id 
ORDER BY 
  company_descr.i18n_company ASC

Query time 0.00157

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "41.37"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "const",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.10",
                "prefix_cost": "0.00",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "category_id",
                "usergroup_ids",
                "status",
                "storefront_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "const"
              ],
              "rows_examined_per_scan": 26,
              "rows_produced_per_join": 26,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
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                "eval_cost": "2.60",
                "prefix_cost": "3.01",
                "data_read_per_join": "416"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "status"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "dev_yourmart_co_bw.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 11,
              "filtered": "45.55",
              "cost_info": {
                "read_cost": "6.50",
                "eval_cost": "1.18",
                "prefix_cost": "12.11",
                "data_read_per_join": "61K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "usergroup_ids"
              ],
              "attached_condition": "(((`dev_yourmart_co_bw`.`products`.`usergroup_ids` = '') or (0 <> find_in_set(0,`dev_yourmart_co_bw`.`products`.`usergroup_ids`)) or (0 <> find_in_set(1,`dev_yourmart_co_bw`.`products`.`usergroup_ids`))) and (`dev_yourmart_co_bw`.`products`.`status` = 'A') and (`dev_yourmart_co_bw`.`products`.`product_type` <> 'D'))"
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "dev_yourmart_co_bw.products.company_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "10.00",
              "cost_info": {
                "read_cost": "2.96",
                "eval_cost": "0.12",
                "prefix_cost": "16.25",
                "data_read_per_join": "7K"
              },
              "used_columns": [
                "company_id",
                "status"
              ],
              "attached_condition": "(`dev_yourmart_co_bw`.`companies`.`status` = 'A')"
            }
          },
          {
            "table": {
              "table_name": "company_descr",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id",
                "lang_code"
              ],
              "key_length": "10",
              "ref": [
                "dev_yourmart_co_bw.products.company_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.30",
                "eval_cost": "0.12",
                "prefix_cost": "16.67",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "company_id",
                "lang_code",
                "i18n_company"
              ]
            }
          },
          {
            "table": {
              "table_name": "war_sum_amount",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "dev_yourmart_co_bw.products_categories.product_id"
              ],
              "rows_examined_per_scan": 20,
              "rows_produced_per_join": 23,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.45",
                "eval_cost": "2.37",
                "prefix_cost": "19.48",
                "data_read_per_join": "378"
              },
              "used_columns": [
                "product_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "opt_prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "dev_yourmart_co_bw.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 23,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "5.92",
                "eval_cost": "2.37",
                "prefix_cost": "27.77",
                "data_read_per_join": "568"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "<if>(is_not_null_compl(opt_prices), ((`dev_yourmart_co_bw`.`opt_prices`.`lower_limit` > 1) and (`dev_yourmart_co_bw`.`opt_prices`.`usergroup_id` in (0,1))), true)"
            }
          },
          {
            "table": {
              "table_name": "abt_normal_prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "dev_yourmart_co_bw.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 23,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "5.92",
                "eval_cost": "2.37",
                "prefix_cost": "36.06",
                "data_read_per_join": "568"
              },
              "used_columns": [
                "product_id",
                "lower_limit"
              ],
              "attached_condition": "<if>(is_not_null_compl(abt_normal_prices), (`dev_yourmart_co_bw`.`abt_normal_prices`.`lower_limit` = 1), true)"
            }
          },
          {
            "table": {
              "table_name": "sop",
              "access_type": "ALL",
              "rows_examined_per_scan": 8,
              "rows_produced_per_join": 44,
              "filtered": "23.44",
              "using_join_buffer": "hash join",
              "cost_info": {
                "read_cost": "0.87",
                "eval_cost": "4.44",
                "prefix_cost": "41.37",
                "data_read_per_join": "34K"
              },
              "used_columns": [
                "user_id",
                "product_id",
                "old_product_only"
              ],
              "attached_condition": "(<if>(found_match(sop), ((`dev_yourmart_co_bw`.`sop`.`old_product_only` = 'Y') or (`dev_yourmart_co_bw`.`sop`.`old_product_only` is null)), true) and <if>(is_not_null_compl(sop), (`dev_yourmart_co_bw`.`sop`.`product_id` = `dev_yourmart_co_bw`.`products_categories`.`product_id`), true))"
            }
          }
        ]
      }
    }
  }
}