Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a74463802756890bb8ebfa9a418237be79014caad74adf863360213159b847cc' 
  AND token = '4B+2BR4Ob6No8WnF7F88+gGyP8gdION4KUvBVRlUkA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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