Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9317329e0e6e24841b174c713cbab360f8176f85079161e7cfea71bfb834c3d' 
  AND token = 'JkHSo3fDi+GNB1NP3MhV1qwbEfQjjKqmTL83+kQbAkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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