Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '953e7cd6b2cb234a5d5d1fdc432fa14f4346bf599e12f5baa1f2846379342a74' 
  AND token = 'tjHcllwjQ4PASoIPkCzvZzXkZ5qFgkTsA9tNianpDfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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