SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '332de9dd068f9ef2a41096c20e8844e27dd38f36181d10c0b019fd572024accd' 
  AND token = 'XiDl9JuFmWVdK6nvRxgEs/BNL4sGVMrNzAYH3vNaap4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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