In a small mixing bowl, whisk together the mayonnaise, sour cream, lime juice, and minced garlic until smooth. Set aside for flavors to meld.
Season the cubed chicken with chili powder, smoked paprika, cumin, salt, and pepper, ensuring even coating.
Heat olive oil in a large cast-iron skillet over medium-high heat. Add the chicken in a single layer and sear until the internal temperature reaches 165°F (74°C), approximately 8 to 10 minutes. Remove chicken from the skillet and set aside.
Wipe the skillet briefly and add the corn kernels. Cook undisturbed for 3 to 4 minutes to achieve a deep char, then stir and cook for an additional 2 minutes.
Combine the charred corn with 2 tablespoons of the prepared cream sauce and half of the chopped cilantro in a separate bowl.
Portion the cooked rice into four serving bowls.
Layer the seasoned chicken and the charred corn mixture over the rice base.
Drizzle the remaining cream sauce over each bowl and garnish with crumbled cotija cheese and the remaining cilantro.