Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b746b21515afa5daed6d60e1a7ef02ca08c339ca76770a96c8fd04d91d9db4' 
  AND token = '9nz7/9zgRHcxUCbGU5KcIfz3aHvMZJbDKs6xWLA3s4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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