Only show people where last active is less than 5 seconds


So i got this email back from a support team member:
current date/time - current user’s last_active :seconds > 5
This was to only show users that where last active is greater than 5 seconds. This would work, but it doesnt. i cant put it in here:

( i update last_active every 5 seconds to current date/time)

Please help!

I’ve run into similar problems when performing calculations in Bubble. Tried to install a plugin that handles advanced calculations such as this one?