SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8151432da0bbe75b8d59fd70fda9159044d89b29797ee467c9bab66bf477c3e8' 
  AND token = '8UhOZXILrmcPst184cZUt/sk8RBmpjK4wibQWzyTlVU=' 
  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"
    }
  }
}