Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3da4cdbd279d1c4c080b3bf0ab83884d1b3caf9d059dbb58d2a3ac2fb65a2e88' 
  AND token = 'S2s79QTZ92nU+bzP0hokmAgE01RMwb0q0g09Ow/XWSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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