Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fa7f69c5a7489673ced7cf48b0a5b22219853c45ecee5b213622efa1e3bf898' 
  AND token = 'xbY7efqGsLN8oBYMnorRkSVLppNX/OrZfy7j866Xvu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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