Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bec6ae9cf36aec253720de49a61f1b058ad5175c7c2998c5be1c67d7d5795335' 
  AND token = 'A+mCL2roek4dxMgxCXAr7kxUdaB3HbSsgMKJY8gSMMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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