The expiration time you shared is in GMT date and time.
To verify that your access token expiration is set for 600 seconds, you can perform the following calculation:
- Token expiration (in seconds) =
exp(Expiration time in seconds) -iat(Issued at in seconds)
The token expiration time should match the value you set in your token settings.
(Reference: Change expiration Time of access token - #3 by rueben.tiow)
Cheers,
Rueben