SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b63ead1ab60e1557e34c8abdb87ace74b9bf5bc2596476b07e7a235fced6301d' 
  AND token = 'y2lwvrS1drgmIVjD8+uEWoAsIPUwjz/k8hqFr8byRYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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