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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    22399, 22400, 22401, 22402, 22403, 22404, 
    22405, 22406, 22407, 22408, 22409, 
    22410, 22411, 22412, 22413, 22414
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "idx_product_lang"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 16,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (22399,22400,22401,22402,22403,22404,22405,22406,22407,22408,22409,22410,22411,22412,22413,22414) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
22399 Grommet-Brake Tube<p>Part number 58716AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22400 Wiring-electronic parking brake connector extension, left<p>Part number 59795AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22401 Wiring-electronic parking brake connector extension, right<p>Part number 59796AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22402 Sensor assembly - wheel speed, left<p>Part number 58930AR600</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22403 Sensor assembly - wheel speed, right<p>Part number 58940AR600</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22404 Cap & Wiring Assembly-Front, Left<p>Part number 54646AR050</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22405 Cap & Wiring Assembly-Front, Right<p>Part number 54647AR050</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22406 Crossmember Assembly-Front<p>Part number 62410AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22407 Bolt - Flange, Taper<p>Part number 1144208206B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22408 Reinforcement - Fender, right<p>Part number 64781AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22409 Reinforcement-fender, left<p>Part number 64771AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22410 Carrier Assembly - Front End Module<p>Part number 64101AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22411 Panel Assy-Cowl & Dash Complete<p>Part number 64200AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22412 Member Assembly - Dash Cross Complete<p>Part number 64350AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22413 Bracket assembly-FEM upper mounting, left<p>Part number 64431AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22414 Bracket assembly - FEM upper mounting, right<p>Part number 64441AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>