SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6963e8ba674b44661af6ac3218954ab837f5d8cd637faa7daa0697d1522fcc30' 
  AND token = 'QvtNr8Kex1rwD2ozvmeUXn/2pG1l9Tg3MouPjCghHJ0=' 
  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"
    }
  }
}