I'm not sure if the Lumias support their speeds, but if the card speed is an issue, consider getting UHS-I or UHS-II SD cards, some have very quick read/write speeds. I have a UHS-II 64 GB SD card that is rated to read up to 95 Mbps, and write something like 60 Mbps. My tests showed it get a reliable average of about 80 Mbps read. Check the speeds when you buy them though, some have slower write speeds. They're a bit more expensive, but can be worth it for things like phones or tablets.
With that said, if getting faster cards doesn't help with performance, it's possible that the phone just can't take advantage of it.