Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9836896e6f250b9815ea00f72233f081124ee608f8af0a4916506eddc1375099' 
  AND token = 'IvOojHUglVmFr+N+AebJ+Xe9fgBgoNkQpiknqlYIMok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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