Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37219ea2d0a1ffb9a00e4d33cfbd515c469c275de92aaa40c42e175aeda42abc' 
  AND token = 'bhNEzmfsBSH1oaqfOqBYZ6qnJJr33Z9oaowstagfTAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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