Relavance for current time

I have a customer who has an issue with locked servers.
I can issue an unlock request, but I want to have it automated so as to not have to log in each time there is an issue.
I see in the unlock action, which I sent, there is relevance as follows,

((not exists effective date of action lock state) OR (effective date of action lock state < universal time “Fri, 19 Aug 2016 10:15:25 +0000”))
I want to change it to read basically the current time and run it as policy, whenever relevant

((not exists effective date of action lock state) OR (effective date of action lock state < universal time “Current date/Current time +0000”))

and then the action script is as follows
action unlock “Fri, 19 Aug 2016 10:15:25 +0000”

So I would also like the action to be something similar

action unlock “Current date/current time +0000”

Any ideas?