SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'eba2b871e6ec280265b96cdaf54712f69a1e67d9687c257a853e614b46df0c3b' 
  AND token = 'DJguOn4ZY8gjtenlAwX7WYlXEAB77K1NFm/6TCvttYs=' 
  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"
    }
  }
}