Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbb870ff3140f40b3c41833fde6b0a635912bb24c940b3c26150df151bbd1850' 
  AND token = 'nNp5wx3G3ra7DLdpboi9By9tYmyig7wmQ1Wc7AZjSNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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