Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a90ae3dc28802b234e5fcca8e3ae20fc4cdd7e32658cd9474a9b4176bc6259c1' 
  AND token = '0P/tEbWYNZzwuNITOumoMpYhIdbIlTvsXPjy1Vi5h7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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