Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63acaf5a3b71a776a9821b2336b2d0ed4631e9828bd728f62bc0ec626cec1838' 
  AND token = 'LnY+A5gJzqvm7VX42X0NCxeaxObTWZOXFDLpag6jqxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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