SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'ru' 
  AND lang.name IN (
    'for', 'compare', 'compare', 'downloads', 
    'view_comparison_list', 'track_my_order', 
    'track_my_order', 'order_id', 'email', 
    'go', 'abt__ut2.contacts', 'abt__ut2.contacts', 
    'email', 'address', 'for', 'compare', 
    'compare', 'downloads', 'view_comparison_list', 
    'track_my_order', 'track_my_order', 
    'order_id', 'email', 'go', 'abt__ut2.contacts', 
    'abt__ut2.contacts', 'email', 'address'
  )

Query time 0.00037

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 ('for','compare','compare','downloads','view_comparison_list','track_my_order','track_my_order','order_id','email','go','abt__ut2.contacts','abt__ut2.contacts','email','address','for','compare','compare','downloads','view_comparison_list','track_my_order','track_my_order','order_id','email','go','abt__ut2.contacts','abt__ut2.contacts','email','address')"
    }
  }
}