SELECT 
  * 
FROM 
  cscart_ec_extra_product_data 
WHERE 
  product_id IN (
    278, 279, 280, 281, 282, 283, 284, 286, 
    287, 315, 329, 330, 331, 333, 334, 335, 
    337, 338, 339, 341, 342, 343, 371, 372, 
    373, 374, 375, 376, 377, 378
  )

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "4.70"
    },
    "table": {
      "table_name": "cscart_ec_extra_product_data",
      "access_type": "ALL",
      "rows_examined_per_scan": 13,
      "rows_produced_per_join": 6,
      "filtered": "50.00",
      "cost_info": {
        "read_cost": "3.40",
        "eval_cost": "1.30",
        "prefix_cost": "4.70",
        "data_read_per_join": "260"
      },
      "used_columns": [
        "product_id",
        "maximum_adults",
        "maximum_children",
        "maximum_room_occupancy",
        "minimum_length_of_stay",
        "maximum_length_of_stay",
        "company_id",
        "blocked_date"
      ],
      "attached_condition": "(`pankajecarter_systemfour`.`cscart_ec_extra_product_data`.`product_id` in (278,279,280,281,282,283,284,286,287,315,329,330,331,333,334,335,337,338,339,341,342,343,371,372,373,374,375,376,377,378))"
    }
  }
}