SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'db4f029fabb2e8a3a861bc3662c0f7ed31b83f17c0ed50cc4c1d6ae26f753a78' 
  AND token = 'GyU3ZCM+AS4joMANn+BpZkNCsjvhsPl16gHtMPsQSuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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