Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d89af66113bd59b3bba0d5b006d19493c6f899564cf0ba0e61a4b94010025cd' 
  AND token = 'rwIw1NyyVfYzphoh1XB83c0iGY2uzZrh9xBecEPhC9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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