Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df947044ca42bab9df43f9d190d40b0961ae722fadfa1bb6c9412de82ead22d4' 
  AND token = 'hNMIP7APk5HJ8FBAT1Hh1kOij5MdDc0B1GoZ5qAoEQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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