Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afa4c93eef8c919bd5f58536b2c6cc9f48c2e9ee02c88f7ceec141a9bf729963' 
  AND token = '6jTzfHltUs1dT5OtO54wuJoJCoORYtbUFGvCqOvE/GE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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