SELECT 
  id 
FROM 
  cscart_auction 
WHERE 
  `product_id` = 4152 
  AND `status` = 'A' 
  AND `winner_user_id` = 0 
  AND `buy` = 'no' 
  AND `auto_win` = 1 
  AND last_price > 0

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.04"
    },
    "table": {
      "table_name": "cscart_auction",
      "access_type": "ALL",
      "rows_examined_per_scan": 5,
      "rows_produced_per_join": 1,
      "filtered": "20.00",
      "cost_info": {
        "read_cost": "0.95",
        "eval_cost": "0.10",
        "prefix_cost": "1.05",
        "data_read_per_join": "656"
      },
      "used_columns": [
        "id",
        "product_id",
        "last_price",
        "status",
        "auto_win",
        "buy",
        "winner_user_id"
      ],
      "attached_condition": "((`dev_yourmart_co_bw`.`cscart_auction`.`auto_win` = 1) and (`dev_yourmart_co_bw`.`cscart_auction`.`winner_user_id` = 0) and (`dev_yourmart_co_bw`.`cscart_auction`.`product_id` = 4152) and (`dev_yourmart_co_bw`.`cscart_auction`.`status` = 'A') and (`dev_yourmart_co_bw`.`cscart_auction`.`buy` = 'no') and (`dev_yourmart_co_bw`.`cscart_auction`.`last_price` > 0.00))"
    }
  }
}