Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d29a27cacbc78efe2a6656e58c96139d074ad84b147df7ac372cac96e42c9a3' 
  AND token = 'evsygAvm2VNudVHgNBhq4gh2p1QseKkrnoya20FDevQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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