Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3ece0636cbed2a53f81a07864b46c53208818420ef799bf3c85152bf27a3335' 
  AND token = 'LrqQ6OHSOdZV2SiSNZtU1TRKHZoMGWAhdQRHhhqRYVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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