Hello Rehan,
Thank you for your question about your token. It didn't expire -- according to eBay, you revoked it manually, probably without realizing what it was. You can verify this from your Completed tab.
The message from eBay said, "This Token has been revoked by App. The end user must complete the Auth & Auth consent flow again to generate a valid token."
We hope we have resolved this to your satisfaction. Please advise if we can help with anything else.
bidslammer