I saw the below in CCO document, i think this command should show the active mls entries.
Console> (enable) show mls ip
Total Active MLS entries = 0
Total packets switched = 0
IP Multilayer switching enabled
IP Multilayer switching aging time = 256 seconds
IP Multilayer switching fast aging time = 0 seconds, packet threshold = 0
IP Flow mask: Full Flow
Configured flow mask is Destination flow
Active IP MLS entries = 0
Netflow Data Export version: 8
Netflow Data Export disabled
Netflow Data Export port/host is not configured
Total packets exported = 0