Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd55786d1404afa02eca8a24f265ac0a7a41508981461c5732e2837cd69cbc50d' 
  AND token = 'N8oA+GiHREDeBbWUqaygNf1N0PpRc1lkT47St8DZXGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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