SELECT 
  vi_product_descriptions.product_id, 
  vi_product_descriptions.short_description, 
  IF(
    vi_product_descriptions.short_description = '' 
    OR vi_product_descriptions.short_description IS NULL, 
    vi_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  vi_product_descriptions.meta_keywords, 
  vi_product_descriptions.meta_description, 
  vi_product_descriptions.search_words, 
  vi_product_descriptions.promo_text, 
  vi_product_descriptions.unit_name 
FROM 
  vi_product_descriptions 
WHERE 
  vi_product_descriptions.product_id IN (188) 
  AND vi_product_descriptions.lang_code = 'pl'

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "vi_product_descriptions",
          "access_type": "const",
          "possible_keys": ["PRIMARY", "product_id"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["product_id", "lang_code"],
          "ref": ["const", "const"],
          "rows": 1,
          "filtered": 100
        }
      }
    ]
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
188 <p>An aggressive core is offset by a responsive cover; Explosive distance is coupled with soft feel; Low driver spin is offset by high greenside spin; Long carry, quick stop</p> <p class="product-promo-text"><span class="product-promo-header">FREE US shipping over $100!</span><span class="product-promo-body">Orders within next 2 days will be shipped on Monday</span></p>