Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '16fce06910333ee7a54429d9b4686a9a2ca5100796326bcbaf86c784e81cfb55' 
  AND token = 'pgP180xpEiYlI751Lf2TzMgUHXUkbRFiGDDGWuX077M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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