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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '83816a8771e80dff128934d1a93cf77c09d9ab489b592263155e31eb6ce28612' 
  AND token = 'W5bt8imZuA6ss2pf9oh04QlFA3OkeNKc1pXmGI1aXrs=' 
  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"
    }
  }
}