Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35917fc58557b356c5e46416daac4a6c13350e77fcf5ee2097b160085f37c444' 
  AND token = 'PduLJNM7yEhAaHDQEMqi099abSyEnjMPP482x4XdKmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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