Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8518c5da3c295b7926b56794c9ce6496086c2eea5a318833bba866eaa19cc537' 
  AND token = 'peJc9oqsTIfE5ylnlCYmwfsWR0YVoX+z+hPIrSH37k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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