Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '557af01b94cea4c1f0442970c0f2a0185b81e328d096a4c6db946d5feb122461' 
  AND token = '3Q2KNzoa3WOijmEIRHOCM34uahWXdA+uNYb3SzVLOIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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