That's how pin pads on doors work: you punch in the PIN, then immediately go through the door. And those pin pads are somewhat popular in commercial settings because it's easier to distribute knowledge than to distribute physical keys.

From TFA:

  > 86% of passwords when thermal images are taken within 20 seconds, and 76% when within 30 seconds

I don't know how long you spend at the ATM, myself I suspect I would typically fit within the 20 second window.