Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '228941c51468b90499be879e50a638a4771304e12d50b894854bdfd4d4701b31' 
  AND token = 'A+IYbmoqDefmVfGPZ4czooN/Ife9H56IL21cK3/CvGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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