SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9568dd653b7259621c486dca50c8ea90d05f9744f93173ba38c5dd524538c978' 
  AND token = '/YSsJPrwPoG5W7CPlgxF+8AmzI3K2FHFmxavLAw6/ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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