Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd59ed5c1e6057a68758855f5a390a65ec08bb0b6c19501223db91b620a5df6e6' 
  AND token = 'hqq1t9zlAyORFU9QgdnBxOY2PQ15IQNhnvWqTiJX9NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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