Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fcdf3bfd123a3e3f593bc804b596aa5b5d85f10ae1db3fe8029aaab24a6a62e' 
  AND token = 'ixIbXKjTiadsNW0TPMo9GEZ7eH9UsVBACVvkMJK8Cuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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