Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c933a2cae103e94305b7e38e286147f6cfae0b39d2de0d28a9392944a5e84f5' 
  AND token = 'QCuftkbjk8ZTcCHdDIZGb6br9ujWJPFuayTBAcIktJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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