Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6558c6ffb08aaf6dedaaaa0078521d3a81560387b9730bae45e293b06e1af578' 
  AND token = '2uZaA2hXT0Gh8smHiqK4TfwF36Mv4Bdf0wjV8C9HHhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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