The Micro SD card you have is perfect and the ideal card for the job. Although a bigger card of the same type would give you more recording time, anything faster is unnecessary. I have a 128Gb card.
UHS Speed Classes is marked with U1 and U3 (UHS mode(Ultra High Speed)) - The Card you have is UHS 3 and is good for Full HD 4K real time video recording.
U1 is only good for HD (ie 1080) real time video recording and not 4K.
Video Speed Class is marked with V6,V10,V30,V60,V90 (HS, UHS mode). - The Card you have is V30
The fastest options – V60 (60 MB/s) and V90 (90 MB/s), will support 8K resolution (7680 x 4320), while V6, V10 and V30 capture high-definition and 4K resolution and guarantee minimum sequential write speeds of 6 MB/s, 10 MB/s and 30 MB/s respectively.
So there you have it - U3 & V30 are what you are looking for as minimum requirements.