Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89bb07ecc55e2e64ac9c071b9857da29189aa8106be2a0894a692d434d0606fa' 
  AND token = '9KxJJgGKuC8Dlg7Dak6eiIBOpnFgo1u6V+1VSzpoYL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}