Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faadfefcf312fa741e5bca754d5350cded2c260c6d0fe9aa2bdf890502570cc9' 
  AND token = 'NfH8swigDmWSHNKm+z5XB/pezxg3VcKYdTlg+wsFFuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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