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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd84d722accab1b2e376b8211e0c41c2b8a3cd7cba537532cdd86cf9cef546c85' 
  AND token = '/n1w2tWV91ujaYM+h5oTXlneWq3FvCC5b5siIk1eXeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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