The time after the unit is active or started is printed after the "@" character.
The time the unit takes to start is printed after the "+" character.

graphical.target @1min 30.456s
└─accounts-daemon.service @1min 30.258s +196ms
  └─basic.target @1min 30.185s
    └─sockets.target @1min 30.184s
      └─lxd.socket @1min 30.179s +4ms
        └─sysinit.target @1min 30.157s
          └─apparmor.service @674ms +154ms
            └─local-fs.target @674ms
              └─var-lib-lxcfs.mount @1min 30.294s
                └─local-fs-pre.target @647ms
                  └─lvm2-monitor.service @118ms +528ms
                    └─lvm2-lvmetad.service @204ms
                      └─lvm2-lvmetad.socket @108ms
                        └─-.mount @59ms
                          └─system.slice @68ms
                            └─-.slice @59ms