Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c22196c86387bb8e62e2ba22e430793c70ffc14a1d3bad2fb1c99ee672f92342' 
  AND token = 'ruLpXjhxetx3KnALIfqPS+a43bzMOzfLBR0qS3eW4p0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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