SELECT 
  lang.name, 
  IF(
    vi_ult_language_values.value IS NULL, 
    lang.value, vi_ult_language_values.value
  ) as value 
FROM 
  vi_language_values lang 
  LEFT JOIN vi_ult_language_values ON vi_ult_language_values.name = lang.name 
  AND company_id = 1 
  AND vi_ult_language_values.lang_code = lang.lang_code 
WHERE 
  lang.lang_code = 'fr' 
  AND lang.name IN (
    'go_to_admin_panel', 'sign_out', 
    'sign_in', 'register', 'sign_in', 
    'sign_in', 'sign_in', 'register', 
    'abt__ut2_sign_in_please', 'account', 
    'orders', 'wishlist', 'comparison_list', 
    'downloads', 'track_my_order', 'track_my_order', 
    'order_id', 'go', 'go_to_admin_panel', 
    'sign_out', 'sign_in', 'register', 
    'sign_in', 'sign_in', 'sign_in', 
    'register', 'abt__ut2_sign_in_please', 
    'account', 'orders', 'wishlist', 
    'comparison_list', 'downloads', 
    'track_my_order', 'track_my_order', 
    'order_id', 'go'
  )

Query time 0.00095

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "vi_ult_language_values",
          "access_type": "system",
          "possible_keys": ["PRIMARY"],
          "rows": 0,
          "filtered": 0,
          "const_row_not_found": true
        }
      },
      {
        "table": {
          "table_name": "lang",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "392",
          "used_key_parts": ["lang_code", "name"],
          "rows": 13,
          "filtered": 100,
          "index_condition": "lang.lang_code = 'fr' and lang.`name` in ('go_to_admin_panel','sign_out','sign_in','register','sign_in','sign_in','sign_in','register','abt__ut2_sign_in_please','account','orders','wishlist','comparison_list','downloads','track_my_order','track_my_order','order_id','go','go_to_admin_panel','sign_out','sign_in','register','sign_in','sign_in','sign_in','register','abt__ut2_sign_in_please','account','orders','wishlist','comparison_list','downloads','track_my_order','track_my_order','order_id','go')"
        }
      }
    ]
  }
}