Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f53f64bec6f1fce30ee45bbb62228a4d0101ccd3ea570438cb82d411ae7184a9' 
  AND token = 'KlM25DlrnzcE+5P0YzKp5Z8XxYeZ8OKBd+WgIxLfIXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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