SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '030618b30c246fc89253d61766405be9f75be393697ed3ac891ef1e1e15348c3' 
  AND token = 'hqnYUEmffrqw6WZaiXPtKedvkJg7xLls5JT/m9/wwf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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