I found this
From Delhi
12031(Thursday)/12029(Monday-Wednesday,Friday-Sunday)
Departure: 7:20 AM, Arrival 1:45 PM
From Amritsar:
12032(Thursday)/12030(Monday-Wednesday,Friday-Sunday)
Departure: 4:50 PM, Arrival 11:05 PM
Is 2 hour enough to visit Golden Temple and come back to Railway Station as its just 1.2 kms away.
I will listen to prayers for few minutes and have langar.