You'd have to find the query, I don't remember it off the top of my head but it' would be something like:
// This query might need some work, something like this though
$where = array("DATE_SUB(NOW(), 'INTERVAL 60 MINUTE') <= s.deptime");
$schedules_list = SchedulesData::findSchedules($where);
And that will return the list. The documentation has the details on how to then loop through $schedules_list