SELECT 
  *, 
  cscart_product_tabs.status as status, 
  cscart_product_tabs.block_id as block_id, 
  cscart_product_tabs.company_id as company_id, 
  cscart_product_tabs_descriptions.name as name 
FROM 
  cscart_product_tabs 
  LEFT JOIN cscart_product_tabs_descriptions ON cscart_product_tabs.tab_id = cscart_product_tabs_descriptions.tab_id 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_product_tabs.block_id 
WHERE 
  cscart_product_tabs_descriptions.lang_code = 'en' 
ORDER BY 
  position

Query time 0.00427

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "9.74"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "3.40"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_product_tabs_descriptions",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY"
            ],
            "rows_examined_per_scan": 34,
            "rows_produced_per_join": 3,
            "filtered": "10.00",
            "cost_info": {
              "read_cost": "3.62",
              "eval_cost": "0.34",
              "prefix_cost": "3.96",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "tab_id",
              "lang_code",
              "name",
              "ab__smc_show_more",
              "ab__smc_show_less"
            ],
            "attached_condition": "((`s2cart`.`cscart_product_tabs_descriptions`.`lang_code` = 'en') and (`s2cart`.`cscart_product_tabs_descriptions`.`tab_id` is not null))"
          }
        },
        {
          "table": {
            "table_name": "cscart_product_tabs",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "tab_id"
            ],
            "key_length": "3",
            "ref": [
              "s2cart.cscart_product_tabs_descriptions.tab_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 3,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.85",
              "eval_cost": "0.34",
              "prefix_cost": "5.15",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "tab_id",
              "tab_type",
              "block_id",
              "template",
              "addon",
              "position",
              "status",
              "is_primary",
              "product_ids",
              "company_id",
              "show_in_popup",
              "ab__smc_hide_content",
              "ab__smc_override",
              "ab__smc_height"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "s2cart.cscart_product_tabs.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 3,
            "filtered": "100.00",
            "index_condition": "<if>(is_not_null_compl(cscart_bm_blocks), (`s2cart`.`cscart_bm_blocks`.`block_id` = `s2cart`.`cscart_product_tabs`.`block_id`), true)",
            "cost_info": {
              "read_cost": "0.85",
              "eval_cost": "0.34",
              "prefix_cost": "6.34",
              "data_read_per_join": "761"
            },
            "used_columns": [
              "block_id",
              "type",
              "properties",
              "company_id",
              "storefront_id"
            ]
          }
        }
      ]
    }
  }
}