Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '589390d2f63c3dfd2ac7ed9b71cd26c45542e76f95c018504938b1316a03adf1' 
  AND token = 'V67lo8yUlqGfTH3C6rb1xJ+eI+9YAxlkWrkpNo06hkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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