Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac6fe9c7d30a0f63e51b2cbccf6a6414481a493b08900d2706cc7054d81d9a23' 
  AND token = 'DNKKJcVAfymu8W9LigghehVfUKvp6Eq5uje3o72Cr4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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