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 (
    92176, 92177, 92178, 92322, 92323, 92324, 
    92161, 92162, 92163, 92164, 92165, 
    92166, 84712, 84711, 84710, 84940, 
    84728, 84729, 84730, 84731, 84732, 
    84733, 84720, 84723, 84727, 84734, 
    84735, 84719, 84722, 84724, 84744, 
    84718, 84721, 84937, 84936, 84949, 
    84950, 84690, 84847, 84854, 84855, 
    84689, 84754, 84755, 84943, 84944, 
    84958, 84952, 84953, 84746, 87963, 
    87971, 84861, 84862, 84851, 94451, 
    94798, 94799, 94823, 94824, 95743, 
    95744, 95745, 95746, 95747, 95748, 
    95749, 95750, 95813, 95814, 95815
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00073

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "31.98"
    },
    "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": 71,
      "rows_produced_per_join": 71,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "24.88",
        "eval_cost": "7.10",
        "prefix_cost": "31.98",
        "data_read_per_join": "270K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (92176,92177,92178,92322,92323,92324,92161,92162,92163,92164,92165,92166,84712,84711,84710,84940,84728,84729,84730,84731,84732,84733,84720,84723,84727,84734,84735,84719,84722,84724,84744,84718,84721,84937,84936,84949,84950,84690,84847,84854,84855,84689,84754,84755,84943,84944,84958,84952,84953,84746,87963,87971,84861,84862,84851,94451,94798,94799,94823,94824,95743,95744,95745,95746,95747,95748,95749,95750,95813,95814,95815)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}