SELECT 
  company_id 
FROM 
  wk_vendor_subdomain 
WHERE 
  subdomain = 'stageuat' 
  AND status = 'A'

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.35"
    },
    "table": {
      "table_name": "wk_vendor_subdomain",
      "access_type": "ref",
      "possible_keys": [
        "subdomain"
      ],
      "key": "subdomain",
      "used_key_parts": [
        "subdomain"
      ],
      "key_length": "302",
      "ref": [
        "const"
      ],
      "rows_examined_per_scan": 1,
      "rows_produced_per_join": 0,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "0.25",
        "eval_cost": "0.01",
        "prefix_cost": "0.35",
        "data_read_per_join": "32"
      },
      "used_columns": [
        "company_id",
        "subdomain",
        "status"
      ],
      "attached_condition": "(`goimagine`.`wk_vendor_subdomain`.`status` = 'A')"
    }
  }
}