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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e076cfaa4acbb7dd5ab21c9844cf924ba30535fbda6f8ea6fe9457a26c2f7598' 
  AND token = 'Xytg9LvvFWxSG2ErpR3p7sjvL47N+Aq37kr6RxsFXco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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