SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    65891, 65892, 65893, 65894, 65903, 65904, 
    65905, 65906, 65907, 65908, 65994, 
    65996, 65998, 65999, 66000, 66002, 
    66057, 66058, 68990, 68991, 68992, 
    68993, 68994, 68995
  )

Query time 0.00075

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "13.72"
    },
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "idx_products_inventory"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 24,
      "rows_produced_per_join": 24,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "11.32",
        "eval_cost": "2.40",
        "prefix_cost": "13.72",
        "data_read_per_join": "125K"
      },
      "used_columns": [
        "product_id",
        "kl_erp_inventory_id",
        "product_code",
        "hsn_code",
        "product_type",
        "status",
        "company_id",
        "list_price",
        "amount",
        "kl_enable_qc",
        "kl_qc_amount",
        "weight",
        "length",
        "width",
        "height",
        "shipping_freight",
        "low_avail_limit",
        "timestamp",
        "updated_timestamp",
        "usergroup_ids",
        "is_edp",
        "edp_shipping",
        "unlimited_download",
        "tracking",
        "free_shipping",
        "zero_price_action",
        "is_pbp",
        "is_op",
        "is_oper",
        "is_returnable",
        "return_period",
        "avail_since",
        "out_of_stock_actions",
        "localization",
        "min_qty",
        "max_qty",
        "qty_step",
        "list_qty_count",
        "tax_ids",
        "age_verification",
        "age_limit",
        "options_type",
        "exceptions_type",
        "details_layout",
        "shipping_params",
        "facebook_obj_type",
        "parent_product_id",
        "buy_now_url",
        "is_stock_split_by_warehouses",
        "master_product_id",
        "master_product_status",
        "master_product_offers_count",
        "youtube_link",
        "show_youtube_video",
        "replace_main_image",
        "position_youtube",
        "restrict_cod",
        "seo_content"
      ],
      "attached_condition": "(`cscart_db`.`cscart_products`.`product_id` in (65891,65892,65893,65894,65903,65904,65905,65906,65907,65908,65994,65996,65998,65999,66000,66002,66057,66058,68990,68991,68992,68993,68994,68995))"
    }
  }
}