SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '464fca1149587f4e5afe57883c9acf5d031e90063182f802054cb14e2356a9b3' 
  AND token = 'Ou6dJuZLBZy7ITVt4+zPtAwpeA1OHS9dvRzgXWjT8W0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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