Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3362e6e022d5d679c62b5c66056ef0ac9a69a124c8d5da3fdfe745534e33670' 
  AND token = 'HRHnxXsDMd2mxmSmcDJ/rIMLsucPxOUdLgWK2schG+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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