Azoten comes from the verb azotar, meaning "to whip" or "to lash". It's a strong, evocative word that you don't encounter in everyday conversation or every song.
In "Astros", the lyric "Quizá te azoten cuando te encuentren" (Perhaps they will whip you when they find you) uses this word to convey a sense of impending danger and harsh judgment. It adds a dramatic and intense layer to the song's narrative about facing life's challenges and consequences.
The verses put you somewhere you did not choose. "Sobre su vientre estás parado" (you are standing on its belly), and whatever you are standing on is already fed by other people: "Más de un esclavo vive en sus tierras" (more than one slave lives on its lands). It wants specific things from you, and the list gets worse as it goes. Your sap, then your dread, then your grief handed over as entertainment: "Dale tus penas para su canto" (give it your sorrows for its song). The line Ciro gives the situation is flat and final, with no blame attached to anyone: "Te tocó el tiempo que te ha tocado" (you got the time that fell to you).
The chorus answers none of that. It simply starts dancing, and it runs the verb through three people so nobody is left standing still: "Bailaré, bailarás, bailará otra vez" (I will dance, you will dance, it will dance again). The reason offered is that something very far away is watching, "Que los astros te van a ver" (because the stars are going to see you), and that "Que un buen trago no viene mal" (a good drink never hurts) "Cuando pega la vida con tanta sed" (when life hits you with so much thirst). Between the two halves the song leaves the rocks still bleeding and the night as the only friend who turned up.