Static access keys is not good for security. According to RFC 6749 access tokens should be short lived--one to five minutes. So issuing a non-expiring access token is basically a security anti-pattern. If possible, I would avoid this pattern. How hard is it to ask developers to get a token at the token endpoint when they need to call an API? It's one round trip...
There is always a workaround in Gluu, but as a first step, I'd say throw this back at your security team, and ask them to seriously consider the implications.