Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '5e0820210d43f4e44ce3e8505da12efd6a9c6cefec892cadc4e0daeba2171413' 
  AND token = 'RZdOok3z+v4PWlX9lkML4gG+/qwBgdgbCU3ZEp3zP4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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