If it says SP2 on the disk labelling, it has it.
If the printing on the disk doesn't mention SP2, it almost certainly doesn't.
If you have an original retail or full OEM disk of XP, you can create a slipstream version with SP2 included, Google for slipstream SP2
If it's a disk that was originally bundled with a Dell or HP or something, or not an original Microsoft disk, well then.... Yer on yer own, podner.
