SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'ja' 
  AND lang.name IN (
    'contact_information', 'text_multiprofile_notice', 
    'billing_address', 'shipping_address', 
    'shipping_address', 'billing_address', 
    'revert', 'delete_my_account_description', 
    'delete_my_account', 'delete_my_account', 
    'delete_my_account', 'usergroup', 
    'status', 'action', 'active', 'available', 
    'join', 'declined', 'join', 'pending', 
    'cancel', 'contact_information', 
    'text_multiprofile_notice', 'billing_address', 
    'shipping_address', 'shipping_address', 
    'billing_address', 'revert', 'delete_my_account_description', 
    'delete_my_account', 'delete_my_account', 
    'delete_my_account', 'usergroup', 
    'status', 'action', 'active', 'available', 
    'join', 'declined', 'join', 'pending', 
    'cancel'
  )

Query time 0.00064

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.02861176,
    "nested_loop": [
      {
        "table": {
          "table_name": "lang",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "392",
          "used_key_parts": ["lang_code", "name"],
          "loops": 1,
          "rows": 16,
          "cost": 0.02861176,
          "filtered": 100,
          "attached_condition": "lang.lang_code = 'ja' and lang.`name` in ('contact_information','text_multiprofile_notice','billing_address','shipping_address','shipping_address','billing_address','revert','delete_my_account_description','delete_my_account','delete_my_account','delete_my_account','usergroup','status','action','active','available','join','declined','join','pending','cancel','contact_information','text_multiprofile_notice','billing_address','shipping_address','shipping_address','billing_address','revert','delete_my_account_description','delete_my_account','delete_my_account','delete_my_account','usergroup','status','action','active','available','join','declined','join','pending','cancel')"
        }
      }
    ]
  }
}