Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '672f26967e0b36e880951db1b1016611a865834bc38a0223935ba8d05da6fcac' 
  AND token = 'BMvxpFLY2ceOT+9TGqd4JBLl4WS6XFyPqI5gNcL9txs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}