Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '49604eea730f7417020f51da848c3c4ea15a2d8101bf8a1900c110b7653676ab' 
  AND token = '3Yg3oNYw6bMwJgk2Fr5aCka8AYzBxdExwvY32QuE+Wk=' 
  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"
    }
  }
}