Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ab6ea7ffb020fd847e55f69afd3a396589ef69dde1e4c5a6b838bd82f5fbee2' 
  AND token = 'z12GI9NzkN5i8Ua26zsGYQ9T6bRw4VF3ItPZmFiCgQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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