Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd96962383cd4a54921ee5f12607e32011b319a3f83e2daef5a05d0ee8a329a7c' 
  AND token = 'gaNM/fdL+CUZc6wIC07jDOryWx9s/3Pc9krah6rQZE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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