Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '02e7c6fa5249a44132680abb9d60c36051047418231e26872d8435debfaae14a' 
  AND token = 'X4GM+HigSG1wT11d4bKtjhLXRvIX0oLgfH+v5idMHcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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