Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3892d89ee59c7166a3358c57e0638034e3b54564a529035692f06b1c3422e57' 
  AND token = 'SV854dhNi6sAo8RcQFs+2TBNYh6Q67qF94/n+zD8Bj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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