select
  t.precio as precio,
  c.nombre as nombre,
  t.meses as meses,
  t.descuento_contado as descuento,
  t.descuento_contado_estado as desc_estado
from 
  curso_tienda as t
inner join
  curso as c on t.curso_id=c.id 
where 
  t.id = ? 
;