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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e1fec1d12a7565338c3d53aabfdba4bde6d7f8e95efa9a54a90644bc40715ca0' 
  AND token = '0lvF1GFXO5DPJM3o17RcyQs62ouyFXj6U10pFUAY+80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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