Getafe failed to create many chances at the Camp Nou, which left the Colombian defender with a rather comfortable afternoon in defence.
"I had a lot of faith that I was going to score, but unfortunately it didn't happen," he explained in his post-match interview.
"I knew I would get a chance and I had to take it."
Mina added: "It gives me a feeling of an indescribable happiness.
"There are no nerves after this result.
"We are calm because we know there is a lot of the season left."