SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    6945, 6947, 6948, 6959, 6971, 6975, 7019, 
    7060, 7062, 7064, 7065, 7094, 7107, 
    7109, 7122, 7136, 7140, 7158, 7161, 
    7204, 7206, 7209, 7297, 6966, 6846, 
    6873, 6883, 6896, 6907, 6908, 6909, 
    6914, 6927, 6950, 6955, 6956, 6963, 
    7003, 7061, 7104, 7164, 7165, 7179, 
    7181, 7273, 7275, 7305, 7310, 7311, 
    6897, 7106, 6967, 6898, 6901, 6915, 
    6932, 6964, 6969, 7090, 7108, 7201, 
    7203, 7207, 7301, 7312, 6890, 6894, 
    6910, 6919, 6974, 6998, 7114, 7298, 
    7327, 7143, 7309, 7314, 7063
  ) 
  AND cscart_product_descriptions.lang_code = 'ar'

Query time 0.00167

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "55.23"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 78,
      "rows_produced_per_join": 78,
      "filtered": "100.00",
      "index_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`product_id` in (6945,6947,6948,6959,6971,6975,7019,7060,7062,7064,7065,7094,7107,7109,7122,7136,7140,7158,7161,7204,7206,7209,7297,6966,6846,6873,6883,6896,6907,6908,6909,6914,6927,6950,6955,6956,6963,7003,7061,7104,7164,7165,7179,7181,7273,7275,7305,7310,7311,6897,7106,6967,6898,6901,6915,6932,6964,6969,7090,7108,7201,7203,7207,7301,7312,6890,6894,6910,6919,6974,6998,7114,7298,7327,7143,7309,7314,7063)) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`lang_code` = 'ar'))",
      "cost_info": {
        "read_cost": "47.43",
        "eval_cost": "7.80",
        "prefix_cost": "55.23",
        "data_read_per_join": "355K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "unit_name"
      ]
    }
  }
}