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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9aafbbb020209d24a34f1a46fabad250f772b7053e4d813951cd2c0844671210' 
  AND token = 'rQvU3umTAqa0ofmJzC7k1O671LzeG9MHkzhdqOG+s0A=' 
  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"
    }
  }
}