SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9064895dafe062a5ed170ad5dc1eb1565716617cb09c90bf8ac9ff7c746ed5a5' 
  AND token = 'P+MhhY6Q/1KKpBfegchAq+T9m+ppUhkCHbVFJE+8Ixw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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