Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0cc3e14e4366713c99edca19230e9d190039c41f14a460f1b8fba0f4b89cf73' 
  AND token = 'JAp2g3M835e/TkAnMOlQW1WA04nhG4N7WP3jzB46fNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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