SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8865f15dfd7f37c27ce62de7f11e92dea94bc7e2a15f3754f1a194b45db4fff4' 
  AND token = 'K6ktzNbddVsWgwXZgqlu4pJk7vBmZPSFlt6RCuJ6n1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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