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 (
    22431, 22432, 22433, 22434, 22435, 22436, 
    22437, 22438, 22439, 22440, 22441, 
    22442, 22443, 22444, 22445, 22446
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00120

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 (22431,22432,22433,22434,22435,22436,22437,22438,22439,22440,22441,22442,22443,22444,22445,22446) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
22431 Holder-wiring<p>Part number 1030205000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22432 Panel assembly - floor, center<p>Part number 65100AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22433 Bracket Assembly - Propeller Shaft Mounting<p>Part number 65115AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22434 Reinforcement-tunnel rear<p>Part number 65149AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22435 Panel assembly - side seal inner, left<p>Part number 65171AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22436 Member assembly - front seat cross rear, left<p>Part number 65175AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22437 Panel assembly - side sill inner, right<p>Part number 65181AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22438 Member assembly - front seat cross rear, right<p>Part number 65185AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22439 Rainf assembly-trailer hitch mounting, left<p>Part number 65431AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22440 Rainf - Rear floor side, left<p>Part number 65436AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22441 Rainf assembly-2ND seat mounting front, left<p>Part number 65437AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22442 Rainf - rear floor side, right<p>Part number 65446AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22443 Rainf assembly-2ND seat mounting front, right<p>Part number 65447AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22444 Bulkhead-rear floor side member NO.1, left<p>Part number 65456AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22445 Bulkhead-rear floor side member NO.1, right<p>Part number 65466AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22446 Support assembly - spring seat, left<p>Part number 65477AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>