Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b8f64aff88551a482e71ad6e5b7256d2b405fdd9c31a65e87866cdecd6f6498' 
  AND token = 'KGLyWF++ugRltIJ2beojgXi9yN15YquR0ojlsgkTwAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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