You don't need to go that fast. It isn't necessary.
You can observe and test scanning efficiency when you're not smuggling. I make it standard practice to always land unscanned. When you do that, you shouldn't have to do anything differently when smuggling.
Alignment on approach in SC is important so that you drop facing the entrance. Once you've dropped, line up centered on the entrance, request docking, boost once from 7 km out and coast in staying around 150 or so. Kill the throttle and drop gear as you enter. Move off the station center line so you can't be scanned from outside, break the line of sight.
Don't panic if you start getting scanned. You can enter the station and break the scan before it finishes almost every time.