Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff750a546ce8b1538ded65b684900ca662cb04d29af3e20b791dead463980b45' 
  AND token = 'APSYIUzBr+NnD90QkGKKNrxIHdQaD8GomwHJwM9waj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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