So there was a waiting time to do the express test today?

I did the express test a couple of times in the previous weeks and there was no waiting time at all whenever I was there.
Regarding waiting time for the result and your flight: Please note that they will take 2 samples. If the PCR test fails with the first sample, they will try again with the second sample.
So you should definitely take some more time! For me it happened once and the result took about 7.5 hours instead of 3.