Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5497a29290fef1e0060a2dbd225465e901879c47d52a6f5ccd8181d7bc7f800' 
  AND token = 'Tar67IPkOpAvQzjcBk3e1u/YeHZ2f0jCfGzkrYfBPI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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