Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c3c6b593c79f6241c43e43e319f4af8c8125f1360ae8c7ad0575427b46a4346' 
  AND token = 'LFZc+HlCi1gHdgNOMa6Z4hMVt6gdFK6NNhLxvFLk4ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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