Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '40f62723c9e00a8f0f05c45061068f7380f080236e9924783c53e7e1fa9ededb' 
  AND token = '4ws69fdRTFliWhPgjLQJklNXrT2ltaJpnfsh/CP/1/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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