Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'add2bb4804c7dd56dbd721c7f7245d38877f1b52c222cb9a41f284d5dd14eb01' 
  AND token = '67cqLMx6dtla6m/TQ3PwyXGaPkQBfI6h1xx7rLAjLwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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