Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c49168242d75bef0ecba724036c184029aa86ac8cef51ea674254b4614cf99d3' 
  AND token = 'tgAsDxcAIr9vixlHmAUZHzzIkCCIIb+x8iRUvohhClg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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