Sending messages at a specific time, how to do it?

Question

Python

Good evening!
Please tell me how to make the script run at the right time, I have a database in it, there is a field with dates in Unix format, I need to send messages at the right time, which corresponds to the time from the database. how to do it right?
Here is an example of
Time Stamp:
1488827040
I need to send a message
vkapi.messages.send(domain='adm', message="q")
and this should be done about every hour, the problem is that if you set the script to a certain launch interval, then you can not hit at the right time which results in not sending the message.

Answer 1

cron?

Answer 2

1) send by if delta > N
2) time.sleep() to adjust so that N is smaller
second per second may not work, and it is not necessary