Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71b3ce06ad3251f97e5a198fb8e2d42e7527ed01eceb8646d523b770b8d154ad' 
  AND token = 'YbapMGOgHKikCTxBnFNg2vnW+9ZwNpn21W5GxXCkH+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}