Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '795016aadca114ac22468646373da2baf74ea0177cfe1ed1bc86e5bcefaa66e2' 
  AND token = 'xM5LeaxRZZuUxqVxk1jbCv8zpX+pBJ1WAwywE+/Kbq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}