Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc9d1251e4c0af4ee05368b290dd1bcbedbd530b4e0ea7ed581efdc87ab87ebf' 
  AND token = 'wj0lKl+jbF0WaljBObaGVaseOCLdJfY/h95myebUEKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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