Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '436f256f269e3652a52875065511ea2ee7b9f9db9a63dd36e7fd57703ed523e1' 
  AND token = 'xp8SxTxtRMiQf5QM6c2MkiBC21qoTD27f3mCfhNBdV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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