Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2bc15a2727b623681a792a9b735cc52c229d60f8fce83dcfba7dcd81213efe5' 
  AND token = 'kyPQ/B/KA0Ylmp+PrY/K58CCk0L9tGMFJ1c7kiFS8Y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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