Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f47156524335a3053d0195459efe072f4587ea4c942c185f1f156bf66e7fea5' 
  AND token = '5TstDD4qPV+U1a9fHPI7Ko9ii1ugvPJG+wh3M7VbpwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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