Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '734b251ed913f6a372a91d6df8f491599dadcb0062ee30e0d31c8abf205d6510' 
  AND token = 'ZjtrwOaBM7ulUICcJDrLg4yEiIM9VLwb8P7wMM/YSO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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