Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '611cdfe596edffdc7309d382136038e5e62d9dfb66b924ac2ef79d08c8966e72' 
  AND token = 'dbYtByrWz+2WCOUZnaM1vzPT4Uts98fdvHGSu6i90JY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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