Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f58338a23a5fec771d650a071f9af3b7f6558382013d9187c359010fc5606c18' 
  AND token = 'MxHyQ3ndlBsrxpZDTlHRu2hwVlB19BfYeEU98ri7+RI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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