Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '430d730d8a354b5c8fe20e54c7c7b5b33b7e280b268c28528a9aea20c2c37189' 
  AND token = '2/5kN9VhO8g2RIrARcCTVALX+tZvvj3pgWbHGiomoEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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