SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'efdf36b8b8cd1da08558d29bea41e209c572df492cc9686885761f0aeafd2d16' 
  AND token = '3h7FGvLZHRHLko7hIR3eyFH34jNs2qKphIEXZYbLRKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}