Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70c56e08fd005e7721afae7bb153d3ab137fc8ad50484807f7afe0d948cf785a' 
  AND token = 'WCPHfFnS1HLgBVFzRGFfmmS9DYIQd3eA+imQ+nREYYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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