Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6feba369653e75697595fb7ce990f42667887893d2e55a33557fc96889569a4' 
  AND token = 'MV5ipFxzsoN9lTsx9XmbtzkkPIbVzNGPHw54pxj741Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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