Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3173abe8dfcb4e0f2cc13b7d69c31b48d64a11e32088a46802ba8c019c88f889' 
  AND token = '0kM94EBpXiaHciqVgYJQ/BXQDfFNL4gzuI7wQTbtALg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}