Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd409a8a7792fd1cbbf2dfc32e621d9abee2207b0fc8db60d45b1352f35c51f41' 
  AND token = 'sZTH+G+oWoM8SEWjADIt0MQemjL25GplTv31wBhA6DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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