Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f28df0effa924f056ba816c0405fb6fc1225046d8b531f48f1c4f0091e81fc4' 
  AND token = 'uzdHc9NgsL2C5h9XmNlxkoX2QqV9+PCiI4Eg8gKPyng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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