Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a4c9b9bf793b98e65bbe8ee60157328f94fcda49c0ec31770114c54c0191493' 
  AND token = '4tMgR5fyr9aR05z0XA7j5xODwMiwjpu1f+qaiykSHnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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