Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fb859ceb08bf64fcb4d5307c94c30d98eb625d661d5744392d101ec401b75d6' 
  AND token = 'ieLBLm6txI4535WELKeGjig4l4eAiZyIjnPKXFv0SRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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