Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb67ef16c93d01719f9e94961aae4508bb6a21ed487ad9a930cf88c6a634e885' 
  AND token = 'ARLSNqLTvCPNccB7ORyyCU9hzOdoK9CC/WqqFb2TWIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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