Why do you need a TO for a fg attempt? They would have had 60 seconds and no timeouts. 3rd and 4. If you get the first down, spike the ball. If it's incomplete, you're in the same position as what ended up happening except you have 50 seconds.
They also used a TO AFTER the 2 minute warning, while the clock was stopped, and immediately before giving up the big play to Landry.