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 (
    22303, 22304, 22305, 22306, 22307, 22308, 
    22309, 22310, 22311, 22312, 22313, 
    22314, 22315, 22316, 22317, 22318
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00040

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 (22303,22304,22305,22306,22307,22308,22309,22310,22311,22312,22313,22314,22315,22316,22317,22318) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
22303 Headlining assembly<p>Part number 85410T6150VNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22304 Plug-trim mounting<p>Part number 857463L000VNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22305 Wiring assembly - loop<p>Part number 91807T6261</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22306 Microphone assembly - active road noise control<p>Part number 96578T6700VNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22307 Hook-luggage covering<p>Part number 85798T6000NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22308 Net-hook, back<p>Part number 85795T6000NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22309 Trim assembly - luggage side, left<p>Part number 85730T6631NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22310 Cover-luggage side trim, left<p>Part number 85735T6000NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22311 Cover-luggage side right<p>Part number 85748T6500NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22312 Trim assembly - luggage side, right<p>Part number 85740T6600NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22313 Tray assembly-luggage side right<p>Part number 85747T6500NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22314 Handle Assembly - Luggage Floor Box<p>Part number 85729T6000NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22315 Tray Assembly-Luggage<p>Part number 85757T6500NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22316 Tray assembly-luggage side, left<p>Part number 85737T6500NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22317 Cover-luggage<p>Part number 85767T6500NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22318 Tray Cover-Battery<p>Part number 857C5T6500NNB</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>