SELECT 
  g.*, 
  gd.group 
FROM 
  cscart_csc_faq_groups as g 
  LEFT JOIN cscart_csc_faq_groups_descriptions as gd ON g.group_id = gd.group_id 
  AND gd.lang_code = 'en' 
WHERE 
  1 
ORDER BY 
  position asc

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "3.15"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "2.00"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "g",
            "access_type": "ALL",
            "rows_examined_per_scan": 2,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.25",
              "eval_cost": "0.20",
              "prefix_cost": "0.45",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "group_id",
              "position",
              "name",
              "timestamp",
              "status",
              "for_admins",
              "for_vendors",
              "for_customers"
            ]
          }
        },
        {
          "table": {
            "table_name": "gd",
            "access_type": "eq_ref",
            "possible_keys": [
              "lang_code",
              "group_id"
            ],
            "key": "lang_code",
            "used_key_parts": [
              "lang_code",
              "group_id"
            ],
            "key_length": "11",
            "ref": [
              "const",
              "CS_Cart_Dev.g.group_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.50",
              "eval_cost": "0.20",
              "prefix_cost": "1.15",
              "data_read_per_join": "48"
            },
            "used_columns": [
              "group_id",
              "group",
              "lang_code"
            ],
            "attached_condition": "<if>(is_not_null_compl(gd), (`CS_Cart_Dev`.`gd`.`lang_code` = 'en'), true)"
          }
        }
      ]
    }
  }
}