Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f9328ad132807cc457d12e87002a968e22478b86e38cef2c5b5a8765a4398db' 
  AND token = 'TarlZdvx/2GlYglTLkUzT8ZOorb1lE9vS77jMjV4svM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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