Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31173dd5d59b5aa49bfec898c5b6d6fb9fefb62534414b1a0eedc765aff4e5ad' 
  AND token = 'yBSUaVLIsdZ+MuYZ9p7d67CEx55cMwoHFwCXHtQfa6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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