The Owner or an Admin for that lock will be able to see the latest history information when the phone is within Bluetooth range of the lock or if a Kevo Plus is connected.
Both the mobile app and web portal contain a history that details when and by which eKey the Kevo is locked/unlocked.
Go to My Locks & eKeys, select the lock and choose the history icon at the bottom of the screen.
Go to My Locks & eKeys > (select a lock) > History icon (second tab from the right on the bottom of the screen)
From your My Kevo homepage, click on the "History" icon (on the top bar, second from the right)