SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06d721c54aac98502b4190deea5c45592bfd4ba9a9e3fc89e3d47a4bae5f3339' 
  AND token = 'z6jdfP6glpqTUqnvJ+oJLIa9qYs7w6IFjAzFVN8YQEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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