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 (
    88396, 88525, 88524, 88555, 93749, 93830, 
    93850, 93851, 93852, 93853, 93854, 
    94595, 94596, 94597, 94598, 94599, 
    94600, 94601, 94602, 94603, 94641, 
    94642, 94643, 94644, 94645, 94646, 
    94647, 94648, 94649, 94651, 94652, 
    94653, 94659, 94660, 94661, 94663, 
    94664, 94665, 94675, 94676, 94677, 
    94813, 94817, 94818, 94819, 95449, 
    95803, 95805
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00071

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 (88396,88525,88524,88555,93749,93830,93850,93851,93852,93853,93854,94595,94596,94597,94598,94599,94600,94601,94602,94603,94641,94642,94643,94644,94645,94646,94647,94648,94649,94651,94652,94653,94659,94660,94661,94663,94664,94665,94675,94676,94677,94813,94817,94818,94819,95449,95803,95805)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}