SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd189e3091e422aa2a84ce285eb21c9549385aa77da635a54df6cc4feff6fff96' 
  AND token = 'OBASsZrj9/O7sCdH441PsYFXYyR7bmdhnSZ6QvK5YNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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