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 (
    92187, 92188, 92189, 92190, 92441, 85582, 
    86891, 91868, 92227, 92210, 85577, 
    85576, 85584, 85592, 85571, 85573, 
    85574, 91877, 91878, 91879, 91880, 
    91881, 91882, 91883, 85555, 85594, 
    85564, 90025, 85575, 86889, 87888, 
    92185, 85561, 86893, 85553, 85559, 
    85560, 85569, 91876, 85545, 84237, 
    85548, 93283, 93285, 93287, 93289, 
    93291, 94452
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00126

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 (92187,92188,92189,92190,92441,85582,86891,91868,92227,92210,85577,85576,85584,85592,85571,85573,85574,91877,91878,91879,91880,91881,91882,91883,85555,85594,85564,90025,85575,86889,87888,92185,85561,86893,85553,85559,85560,85569,91876,85545,84237,85548,93283,93285,93287,93289,93291,94452)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}