Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bff6f334935b48973a194a6cea4d1e5d2dd0cbef07b7dece5dc58f14f7e56c9f' 
  AND token = '08pum7XnbQL5vcBjsW94fHTjUgHxTShgGogjI5YL4s4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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