Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95857e570d221d8090f59d6eed8fd8f45152ce5ee1b61dadbdf3b242083083dc' 
  AND token = 'nN9ckucayhbQ+GmTjXgo2qTjadK6JK8vNKY6wxedXFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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