Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7f72ee6c1b8d17e3e2ff59a6002e4aeb562fb57e1b50a3ef528cdec6d870843' 
  AND token = '8Y44/9OP0zB/tN3kQvkl+sUyHm6EvFLLtFimGgbVobM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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