Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c45c27517322b66d4720d1bea2051cc738bc4b640ae45e3ec685a1d82a07f4f9' 
  AND token = 'gPwNs0RtdlqE/yPe+1QSid19WH+KMcNboBmcaK6omaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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