SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '536925f2c04507ab7d4b40822860445d37d2fd9d06b98c5fdb28ef1ab899f68b' 
  AND token = 'LFD0Vw+LetUnbmKuAGBYNNffdpghZhe1T4mszMZZw2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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