Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de1f4803e3273daff36866f10b0c561be21dee8f956324196a76a515571ec117' 
  AND token = 'nu43Dx6BhypbsEObwjzuWdNGv2dKAqEwK0WupiiHOUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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