Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '816d7245eaabfa928604cad6b8c888903697f46dd87b5115ca87d7f10a813236' 
  AND token = 'Nuhh8+gq+BEsAjOswDUncX/NAoFCACLEeUNFcRnNmrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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