Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b9d9e47980e5aecbe1fee41c1a73e737b22e77d9699463ac73e4e3501699eb1d' 
  AND token = 'cQAsnn+7nc4r76rJZMBW/ea/a5uDfQUkEAnn3LcTIQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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