Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fe8782734813bb3534c29c51eb201c318d957b7ebf64c5ceff463ac6eed8f1e' 
  AND token = 'fP40cJmEMEjUEJZAPJqBy6qneMLw+i9Ay4+AOD9nszI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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