Publication: any distributor can do that for cheaper
Mastering: you can do that yourself
Promo pool packages: could mean a lot of things, none of which are worth 68€
UPC codes: standard with any type of distribution
Anti-piracy measures: won't do jack shit, believe me
Promotion: could mean anything, most likely they'll just mail your single out to a list of YouTube channels and DJs and forget about it
I'll admit the cover art sounds intriguing, but what do all their other covers look like? If it's just a fixed template with their logo and different colors and titles, run far away. That means they're too lazy to make a good cover that matches the music, and they're only interested in promoting their brand. If their logo is bigger than yours, that's what they're selling. And pulling a picture off Google Images for the background doesn't make it better.
In conclusion: not worth 68€. They probably sent the same email out to thousands of other producers. If they want that much up front for one track, they're in this to make money.