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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0e9be60a9d5e6aabf8b91e3f907e222d3bbbb6637d6c89ae90d2e0765e6ed2d1' 
  AND token = 'Ovbnbok5NKmCcJe+ag1LVGuocGWVMDYe6lzBdN9jKjI=' 
  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"
    }
  }
}