Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c741e09e658d7e1cd383ef464fbeb8a4c2d38f7f9ff9715d713efcb086c12ed' 
  AND token = 'kFPrfZ8gWzPJ7xaj0EWAtxW+yCvBiYD5JGFUFQpp3ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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