Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '4b7946c5805c1b4dcb9b27949420223275717c75cb221d8cf3ff1b849efd25b9' 
  AND token = 'QbG63Irg0xGOibajtz2EKbw7PIeK2qbjWSBJ1Xj/eyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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