Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e894a49166227479a995253993669b979b0da0e346b5410530abab55ae16bb3' 
  AND token = 'KhVnpG4zkbWYi9xK8gvj4QWSHyBBKQmKriYB98NjHDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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