SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07d084803cb8894adb9c3497e6f12c48dde2f5c5055ded0327da2bb23d98ed5e' 
  AND token = '/pAZhVvZTL9GlK5jgC4icIwRSNJo/zoLvcZkCE/WQfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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