Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'ccc6f5368acfe6e8915d7482bf1d5a6e633ed963367c559202743505ba4b796d' 
  AND token = 'inN3mfhDT6hGs76gI5N6UgtOJG97OuLgp0KeLvGzdvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00767

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}