Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a541af8c5ea4868755f81fc917c4aded40d976ac7e120baa9055cc48b331c223' 
  AND token = 'IapIVF1KPYFE0hTSPynIRfNuzLO9wpvhu6oKFULzBNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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