Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8c1733abb765ad740ba0d716246e76acbd4f2b51caceddbfbcc89a9326695d0' 
  AND token = 'PRVpUcDIDWv74GNG88N+mGu7pkS0JU+vjek726eHWiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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