Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c09e3144bf6338961d93477f0df5c146dc06e66737479075812d90eea08494ca' 
  AND token = 'IqooiA709ym/kH97gznP/ml5VxsH5h4Dl1VgHrzIVAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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