Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24c864a56a8b69ff6e3ebd28ccd2ed569dfda86c3a549e3ceda0fd6adee6cf6a' 
  AND token = 'Bxs/uZPAZES7xP7kqr9hQePFSve8LSRvjy0izG+YahA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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