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 (
    88393, 93790, 93791, 93842, 93843, 93844, 
    93845, 94619, 94620, 94621, 94622, 
    94623, 94624, 94625, 94626, 94627, 
    94628, 94629, 94630, 94631, 94632, 
    94633, 94634, 94635, 94636, 94637, 
    94638, 94639, 94640, 94671, 94672, 
    94673, 94674, 94822, 94844, 94845, 
    94846, 94847, 94848, 94952, 94953, 
    94954, 94955, 95310, 95311, 95317, 
    95320, 95361
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00104

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 (88393,93790,93791,93842,93843,93844,93845,94619,94620,94621,94622,94623,94624,94625,94626,94627,94628,94629,94630,94631,94632,94633,94634,94635,94636,94637,94638,94639,94640,94671,94672,94673,94674,94822,94844,94845,94846,94847,94848,94952,94953,94954,94955,95310,95311,95317,95320,95361)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}