Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '6d18f5f73ce2701267e05bbe8b31d4597f6bb40fcb5fd0593c86cda8a3e5c17d' 
  AND token = 'wIRn9iWpxkuCCPmyHYDa2osdOuAO11QRtgWwp2e4FzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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