SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2691a17ea99189a8f36452e42c33c95b258565c949d4616bda2765ad518a87b4' 
  AND token = 'Qf5T60QXeDPeKfzyZLWrFDXZteguBc2lQ2o4Wj+hdvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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