Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf0df0cbbb78a065a0a63aa9cdae21f1ecbf028eb2e0c3ddd1b35290272e5511' 
  AND token = '0rUjdMpicoEyG1ZDgrwhepHVyn4oVhMJhnLCvbJoJ2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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