Ok, it took me some serious digging around to find the song you're talking about - but I managed to find a song with the lyrics "Hey, you, mira get ready to play...mas, mas, mas"
The song you're looking for is called "Mara" by the electro-latino artist DJ Dale Play.
Until I looked this up, I honestly had no idea what zumba even was.
I now see this song is pretty popular in zumba sessions all across the planet. Proof of this is the number of amateur zumba videos on YouTube with this track playing in the background.
I think part of the problem with why you were struggling to find this song is that the lyrics to Mara by DJ Dale Play are nowhere to be seen online!