Are there any hypersonic planes in service today?
As far as supersonic commercial flight goes, Nope. The Concorde and the Tupolev Tu-144 are both long retired.
As pointed out in the comments, hypersonic commercial flight has never existed.
The SR-72 you speak of is supposed to be flying by 2025.
This article points out that

Only a few experimental planes have ever reached hypersonic speed, and the last time a hypersonic plane flew with a person on board was in 1967. That plane, the North American X-15, was powered by rocket engines, which are impractical for commercial air travel.

The same article mentions a potential 'in-development' aircraft:

The Stratofly consortium plans to begin wind tunnel tests of the engine components. But it will take many years to bring Stratofly to life. The key technologies might not be ready until 2035, Viola says, with another decade needed before flight tests are completed and the plane is ready to carry passengers.