Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba991b4b13fcdd12ca50fbaab59f6bec0509eaae6dbf9b48638d6b56aafdd9c9' 
  AND token = 'pRGoeSKdj528NGMjcIsuuVoqjNiJYvE6DLk17DlCYUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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