Combine the crema ingredients in a small bowl; set aside.
Combine spices for the tacos in a small bowl. Sprinkle over both sides of the shrimp. Heat a small skillet with 1/4 Tbsp olive oil. Cook shrimp over medium heat until pink and cooked through.
Heat tortillas according to directions on package. Divide shrimp evenly among tortillas; top each with crema, tomato, and a sprinkle of lime juice.