"The Pupusaria" : to my knowledge this is the only pupusaria in Conway.  They serve Mexican and El Salvadorian food.  Pupusas are El Salvadorian and delicious; basically a thick stuffed tortilla.  At 'The Pupusaria' you can choose from Beans, Pork, and Cheese (any mixture of the three).   Topping comes on the side: pickled cabbage and other goodies, as well as salsa. .  At only $1.50 each these make a super affordable meal.  For $ 1.65 pupusas can be made with rice flour.   They also have quite a number of Mexican items prepared in the more authentic style, but this editor has not yet wanted to put down the pupusa to find out what else is good. 

Menu

• Pupusas (Pork Meat, Cheese, Beans) - $ 1.50
• Tacos (Steak, Pastor, Barbacoa) - $ 1.25
• Tortas (Mexican Sandwich; See below) - $6.00 
• Choose: Steak, Breaded Chicken (Milanesa), Pastor, Barbacoa; with avocado, lettuce, beans, mayonnaise, tomatoes
• Burrito (Chicken or Steak; cheese, beans, rice & sour cream) - $7.50
• Quesadillas (Chicken, Steak) - $3.50 (? needs confirmation)
• Sopes - price unknown
• Salvadorian Breakfast - details unknown
• Fried Plantains - details unknown
• more options to be listed soon...

Remember, you need to take cash.