Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99f2efe7ec4ba886adbe8a7a6d651302fe532675cc0e54b54df6c34b68278228' 
  AND token = 'Eel4TFVSV1gcP7i1Ea3CPG60iQU83uH3bN0x0WbvF2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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