Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dd5e6905d93bac7d8127c6b5433f22041db4284528046eef478ff483248994d' 
  AND token = 'x6TWbfy/0LR5RIpVbLZpPNNzfB33sbBWmM3EvUWd9jc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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