Escarbando literally means "digging" or "excavating." While it can refer to physical digging, it's often used metaphorically to mean prying into someone's affairs or searching for something hidden.
In this song, the artist uses it to warn others not to "keep digging" into his past or his business, implying that they won't find anything negative and should mind their own business. It's a vivid and somewhat aggressive way to tell people to stop meddling.
Abraham Vazquez and Tony Aguirre team up for "Conmigo Es Diferente," a song that's all about staying true to yourself when you've worked hard to get where you are. Abraham sings about not being boastful, because he knows what it's like to start from nothing: "No soy presumido en lo que hago / Porque sé bien lo que es subirle de abajo, para llegar aquí" [I'm not boastful in what I do / Because I know well what it's like to rise from the bottom, to get here]. He talks about how people start to gossip and get envious when they see you doing well, but he's not letting it get to him. He's a hard worker, and he makes it clear that trying to bring him down is a waste of time.
He's got a strong message for anyone trying to cause trouble, saying "Mejor no sigan escarbando están buscando agujas en un pajar" [Better not keep digging, you're looking for needles in a haystack]. Abraham also touches on loyalty, noting that it's hard to find these days, but he's always observing people and their true intentions. He's the backbone of his family and would do anything for them, remembering a time when he didn't even have money for food. But things have changed, and he's still standing strong: "Pero la moneda dio mil vueltas y aquí seguimos de pie" [But the coin turned a thousand times and here we remain standing].