Comment 4 for bug 1871784

The expiry may be set in the database, but it is ignored in the code:

https://opendev.org/openstack/keystone/src/commit/07abf2fa4d5c2bc5dc1c77d700ac3589d1169d3f/keystone/identity/backends/sql_model.py#L181-L188

Why is it important whether it is set in the database? Are you experiencing an error or seeing incorrect behavior? Can you show exactly what behavior you are seeing and what behavior you're expecting? The underlying implementation in the database should not be important, you should only be interacting with the REST APIs.