Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55fc055edc170196136437cc815c7711fbc42954aedf01cfb441f538785455fc' 
  AND token = 'Y7oOA2kfz4hvgH/MrLjG1P7Ztxf2bRMmkbAcqK/kvO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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