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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9f805b481dd406649367ec266ec15315b4957c638e234bfcfd0af3d67162ccff' 
  AND token = 'pWdktbKBYN22J7vnQCaB8WN5N4Cu+6v+l+h+ooJDEBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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