Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e72f3f40a11c13fd2a081aef4b61684d8d813c7d9d3a6823666be4f53c01ad72' 
  AND token = 'ZTEysiLf9oveql0VqGQiO9OrYTydj/53nXJyoOjhyho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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