SELECT 
  status_id, 
  status 
FROM 
  cscart_statuses 
WHERE 
  type = 'O'

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "2.72"
    },
    "table": {
      "table_name": "cscart_statuses",
      "access_type": "ALL",
      "rows_examined_per_scan": 22,
      "rows_produced_per_join": 2,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "2.50",
        "eval_cost": "0.22",
        "prefix_cost": "2.72",
        "data_read_per_join": "35"
      },
      "used_columns": [
        "status_id",
        "status",
        "type"
      ],
      "attached_condition": "(`s2cart`.`cscart_statuses`.`type` = 'O')"
    }
  }
}