Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71710a32c169b4c5f57e7a99adb04c158f38958432659e20103c22d8f51fb909' 
  AND token = 'uD2ATuxYuxRiBL/eFbjN2/q3rTnkGIrPW57angpIQxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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