Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd15f48bbe2eae87d10d7ef9c21eaca470faebdcdd7bde681af96b463198039c8' 
  AND token = 'UEu1m4mZGaXmfDWrPjd4gW4spV/WMMtNcWaAT1PTPk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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