SELECT 
  * 
FROM 
  cscart_ab__sr_reviews_pages AS rp 
  LEFT JOIN cscart_ab__sr_reviews_page_descriptions AS rpd ON rp.reviews_page_id = rpd.reviews_page_id 
  AND rpd.lang_code = 'en' 
WHERE 
  object_id = 349 
  AND object_type = 'category'

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "rp",
          "access_type": "const",
          "possible_keys": [
            "object_id"
          ],
          "key": "object_id",
          "used_key_parts": [
            "object_id",
            "object_type"
          ],
          "key_length": "102",
          "ref": [
            "const",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.00",
            "eval_cost": "0.10",
            "prefix_cost": "0.00",
            "data_read_per_join": "112"
          },
          "used_columns": [
            "reviews_page_id",
            "object_id",
            "object_type",
            "status"
          ]
        }
      },
      {
        "table": {
          "table_name": "rpd",
          "access_type": "const",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "reviews_page_id",
            "lang_code"
          ],
          "key_length": "10",
          "ref": [
            "const",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.00",
            "eval_cost": "0.10",
            "prefix_cost": "0.00",
            "data_read_per_join": "3K"
          },
          "used_columns": [
            "reviews_page_id",
            "h1",
            "description",
            "page_title",
            "meta_description",
            "meta_keywords",
            "lang_code"
          ]
        }
      }
    ]
  }
}