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 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    88066, 88075, 88082, 87958, 89982, 89983, 
    89984, 88046, 88045, 87987, 87997, 
    88026, 88047, 88048, 88050, 88051, 
    87937, 87950, 87952, 88004, 87948, 
    88029, 93794, 94496, 94499, 94501, 
    94515, 94581, 94843, 94850, 94852, 
    95309, 95316, 95376, 95762, 95778, 
    95779, 95823, 96119, 96508, 96530, 
    96570, 96572, 97620, 97623, 97625, 
    97639, 97705
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00121

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "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": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (88066,88075,88082,87958,89982,89983,89984,88046,88045,87987,87997,88026,88047,88048,88050,88051,87937,87950,87952,88004,87948,88029,93794,94496,94499,94501,94515,94581,94843,94850,94852,95309,95316,95376,95762,95778,95779,95823,96119,96508,96530,96570,96572,97620,97623,97625,97639,97705)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}