Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43d63b88504fc15f11bf5b7c51e085df84f2ca8d18aee7e2c9d0556e26291d6b' 
  AND token = 'V+osNCQXdntnZlJGLBGH+bH7SuO/WMLtti2Yy3XxiGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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