Sandbox

SELECT 
  product_id, 
  short_description, 
  full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  product_id IN (3928) 
  AND lang_code = 'en'

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "const",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "ref": [
        "const",
        "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": "3K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ]
    }
  }
}

Result

product_id	short_description	full_description
3928		<ul><li>The do-it-all trail tire</li><li>Aggressive, high volume thread</li><li>EXO Protection offered in select models </li><li>An aggressive tread in high-volume casing, designed with great traction in mind</li><li>The Ardent doesn't forget the racer with large block-style side knobs offering numerous edges for high-speed cornering</li><li>The center tread, while ideal for braking and accelerating traction, also features ramped knobs to minimize rolling resistance</li><li>With a wide variety of size offerings, the Ardent captures every mountain rider's needs</li></ul>