Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd33e7a7bca0c1f473532818c78fd5c2e8386d4b68445c1628ea21b6cee33969e' 
  AND token = 'wEv5CRdk7cOUQnzxxg1s4yPYsZQB7rWbIZGY6hkdAt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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