SELECT 
  * 
FROM 
  cscart_ec_table_booking_system_price 
WHERE 
  product_id = 339726

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "14.54"
    },
    "table": {
      "table_name": "cscart_ec_table_booking_system_price",
      "access_type": "ALL",
      "rows_examined_per_scan": 61,
      "rows_produced_per_join": 6,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "13.32",
        "eval_cost": "1.22",
        "prefix_cost": "14.54",
        "data_read_per_join": "146"
      },
      "used_columns": [
        "id",
        "product_id",
        "from_date",
        "to_date",
        "price"
      ],
      "attached_condition": "(`webmarco`.`cscart_ec_table_booking_system_price`.`product_id` = 339726)"
    }
  }
}