Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f480ed06a70eda7bcfa0ee566790a06af44f67c237cc1d30426df870f6938f9' 
  AND token = 'JVj0TxJaeYs8q5+my7bxtXsiFb8UD1cJ6hm0KOS5d4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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