SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'ru' 
  AND lang.name IN (
    'mb_kr_home.blog.filter_search', 
    'mb_kr_home.blog.filter_month', 
    'mb_kr_home.blog.filter_reset', 
    'mb_kr_home.blog.search_empty', 
    'mb_kr_home.blog.related_posts', 
    'mb_kr_home.blog.newsletter_title', 
    'mb_kr_home.blog.newsletter_text', 
    'email', 'email', 'subscribe', 'mb_kr_home.blog.back_to_blog', 
    'mb_kr_home.blog.filter_search', 
    'mb_kr_home.blog.filter_month', 
    'mb_kr_home.blog.filter_reset', 
    'mb_kr_home.blog.search_empty', 
    'mb_kr_home.blog.related_posts', 
    'mb_kr_home.blog.newsletter_title', 
    'mb_kr_home.blog.newsletter_text', 
    'email', 'email', 'subscribe', 'mb_kr_home.blog.back_to_blog'
  )

Query time 0.00067

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "lang",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "392",
      "used_key_parts": ["lang_code", "name"],
      "rows": 10,
      "filtered": 100,
      "index_condition": "lang.lang_code = 'ru' and lang.`name` in ('mb_kr_home.blog.filter_search','mb_kr_home.blog.filter_month','mb_kr_home.blog.filter_reset','mb_kr_home.blog.search_empty','mb_kr_home.blog.related_posts','mb_kr_home.blog.newsletter_title','mb_kr_home.blog.newsletter_text','email','email','subscribe','mb_kr_home.blog.back_to_blog','mb_kr_home.blog.filter_search','mb_kr_home.blog.filter_month','mb_kr_home.blog.filter_reset','mb_kr_home.blog.search_empty','mb_kr_home.blog.related_posts','mb_kr_home.blog.newsletter_title','mb_kr_home.blog.newsletter_text','email','email','subscribe','mb_kr_home.blog.back_to_blog')"
    }
  }
}