SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e2407f9c9f9d07271b41ccb962eab464d8fc7e33bf80769785746a8928f922b2' 
  AND token = 'CRY0YngWEOBGkYfd6YqSs2gA5GVLbDeutOT+qkPH5gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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