SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa5a8f6f3a366e39baeb5acfa305c217d6df912a8f823cdbf345300708098f16' 
  AND token = '2nqY0bRaX4Gzp52oc+c6hyiz0dpZBOgZJJMQh1NOnCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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