Candado literally translates to "padlock", which might seem like an unusual and unromantic word to feature in a love song.
However, Grupo Frontera uses it brilliantly right after singing about taking a trip to Europe ("Viajaremos a París / Ya tengo tu candado"). The lyric is a beautiful reference to the famous love-lock bridges in France, where couples attach padlocks to the railings to symbolize their unbreakable bond. It turns an everyday vocabulary word into a memorable, romantic metaphor.
This song is one of the most direct and romantic proposals you'll ever hear! The singer sees someone and immediately decides he has to have her. He starts simply enough, asking, "¿Qué te parece? Si te acercas y platicamos despacio" [What do you think? If you come closer and we talk slowly]. But he quickly raises the stakes. He confesses that before seeing her, he felt like "un hombre que la vida no valora" [a man who doesn't value life], but her arrival has given him a new reason to exist. It's a huge, sweeping declaration right from the start.
From there, the promises just get bigger and more specific. If she says yes, he'll do anything, claiming "Moveré el mundo por ti" [I will move the world for you]. He's even planned their future, promising, "Viajaremos a París / Ya tengo tu candado" [We will travel to Paris / I already have your lock]. He offers to buy her whatever shoes or purse she wants and take her for wine on the beach. He's not just offering gifts; he's offering total, lifelong devotion, telling her she deserves a guy who wants to stay with her forever and that he is that guy.