Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb583faf17f7afc17add7823f13bb5a6b08beace6e3a750ec4ebd614febda49f' 
  AND token = '8heLo6r32Jt/3fKB7WNtawN7OEiuls6ioKvY3YWa+BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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