SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '17cacc18c17e87c496da31c0cb31a2e350308c69ef7ae7f2ccdba72f2222c2f0' 
  AND token = 'rIn51iJf9ifR++RBX7zjMqmSZz5kCYwVGuwdw+gnrAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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