Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f06fa3ddad4c842c1f63a64fd43a60b96cc4116a8fa2064d83ad9b2e5d56f7c' 
  AND token = 'hmdo8jff3hZeQvaimhSFDfPdfAQ1wIFUvh4EsqxAzkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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