SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e69eae7610290145ad7e4c24eb3acfdaa63142a6db950b634bd30c5d873829d8' 
  AND token = '53lpYgd/6uNzGEjVE/deFFiPhZqzq9iYy8jBYE6lL+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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