Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b05eb7ddb344483eadcc07b51e72f9ef5e8be9f69b1c56cc0ff691e0baccc008' 
  AND token = 'MvWLiWtMwMCIsqfjVKPq/zw1ndPsZKRLHWCR1zzsGro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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