Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3270b51333e6397dcad334907e259b7de65d9eaac39fffd97217725259368219' 
  AND token = 'ZckWb0gityoBuPtg4Cfe0ErKnmxLWQXAPMGVtoanT30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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