Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bff81bee4fff7903f5015cc7efa0f017a6a8aaddb9f071181f40358cef42fdb0' 
  AND token = 'sZhlQrXhUueJX1axfvOwoJG/E7SV8/VT99aSu+Tit3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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