SELECT 
  link_id, 
  link_href, 
  section_id, 
  status, 
  position, 
  link_type, 
  description, 
  object as link 
FROM 
  cscart_sitemap_links 
  LEFT JOIN cscart_common_descriptions ON cscart_common_descriptions.object_id = cscart_sitemap_links.link_id 
  AND cscart_common_descriptions.object_holder = 'sitemap_links' 
  AND cscart_common_descriptions.lang_code = 'en' 
WHERE 
  section_id = 2 
ORDER BY 
  position, 
  link

Query time 0.00110

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "3.00"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_sitemap_links",
            "access_type": "ALL",
            "rows_examined_per_scan": 4,
            "rows_produced_per_join": 1,
            "filtered": "25.00",
            "cost_info": {
              "read_cost": "1.60",
              "eval_cost": "0.20",
              "prefix_cost": "1.80",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "link_id",
              "link_href",
              "section_id",
              "status",
              "position",
              "link_type"
            ],
            "attached_condition": "(`webmarco`.`cscart_sitemap_links`.`section_id` = 2)"
          }
        },
        {
          "table": {
            "table_name": "cscart_common_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "object_id",
              "lang_code",
              "object_holder"
            ],
            "key_length": "108",
            "ref": [
              "webmarco.cscart_sitemap_links.link_id",
              "const",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "1.00",
              "eval_cost": "0.20",
              "prefix_cost": "3.00",
              "data_read_per_join": "608"
            },
            "used_columns": [
              "object_id",
              "description",
              "lang_code",
              "object",
              "object_holder"
            ],
            "attached_condition": "<if>(is_not_null_compl(cscart_common_descriptions), (`webmarco`.`cscart_common_descriptions`.`object_id` = `webmarco`.`cscart_sitemap_links`.`link_id`), true)"
          }
        }
      ]
    }
  }
}