Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17cca55975b3c0604317500802988dc548f237bd2debae68084650f08f5804c7' 
  AND token = '7SBGgUCO5uO+MQou+hpPjnjZe4L7fA/4fzvy4DRMwx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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