Hello Roshan
Yes, this is the case because PIM sparse mode uses an RP and the Auto RP discovery protocol to automatically find the RP in the network. This will use the multicast group address 224.0.1.40. This is why you will see (*, 224.0.1.40) in the output of the lesson even before the command is initiated.
However, it is once the ip igmp join-group 239.1.1.1 command is implemented that you will see the specific route for that group as shown in the lesson.
As for the timers you see in the show ip mroute output, these are the “Uptime/Expires” timers. The first indicates how long the entry has been in the IP multicast routing table while the second states how long until the entry will be removed from the table if no additional traffic is seen.
I hope this has been helpful!
Laz