SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b3d5012311d1d87a6995249c07d949629edfaf7af792035121b0158de159fe6b' 
  AND token = 'DUbHKBlrsWQWIgY4Xi5ZDC+nXIoXnpkHgKtYgwRkB64=' 
  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"
    }
  }
}