Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96d8517d897b67ac07c09d349b717859957f3064a36caeac3ceee525996b5821' 
  AND token = 'DWq0DZK7cbTQo2xqBPEKXFjUZ6BeKai6aSu0MrXqu6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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