SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd409c7bec399132b78e840623e5caecdc726f6e6c050d36fdce4299cf067c7a1' 
  AND token = '20Z7KQP6tUwFcyH5I4/rqJseZ+GnwiJaCqU+ZkguJl4=' 
  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"
    }
  }
}