Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6420c04b85520084d339f9831ce370f0268e2069df43666b3d25e7ae5a3a3760' 
  AND token = 'ysFVwvRn8g7aO7dheefqdUBGCLxp6BR3ku7RE6raqy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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