Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd0f9abd8d426199c96bdf97955902dda168c3efc83528a5568d09b072a5fd1e' 
  AND token = 'P7Mne2RM6YtFiAiPCMlA1up0ucgIuCSUi5ZiSPk9cuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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