Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '897b591695733d3c94957062f1db8690bbcc5d22722251757270c20fc4533242' 
  AND token = 'sPq3uJ1AXUjWbkZT/ZE/+1o6IMsPv1eZvVJrVc2rKP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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