Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '655db3e1829ba6c7c806ccc4d3d14345040eadd26fa8a77d377617206c8154e5' 
  AND token = '/Vxal/R7gdXJBVg3IXHWTv790X6CULxF1F+jv2bjUn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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