We haven’t exposed the functionality through the UI, but you can query access keys using the API:
To query by description:
https://api.losant.com/applications/YOUR_APP_ID/keys?query={ "description": "YOUR_DESCRIPTION" }
You can also query by which device IDs are configured on the access key. If you have a key configured using tags or “all devices”, you cannot query by specific device IDs that have used that key - only by device IDs specifically configured on the key.
https://api.losant.com/applications/YOUR_APP_ID/keys?query={ "deviceIds": "YOUR_DEVICE_ID" }