Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4517663c2d959eabb7f04e00ef759ff9ed4b7e1d3c9ce66f55b102098e539abd' 
  AND token = 'oXL1L5bxuoiAVklhCpuWJq7uklRAAIxKz3vIIYDxAss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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