Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc8268928bbdb3110e00e646ae89daf5ede83b81b941271d04afba8cf7ceeec' 
  AND token = '5tTbVBf4W8xa3N+x1Ah0HgivVtRiEn0Ou1uLUIW6iEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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