Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c7ba06d5b02cbd657a2dc36a9615d31307f66f8041ccf5ad40065b0c526a005' 
  AND token = '23MtGzqWVAYghVIKBkeJZgVDVhy7OQbdmla+g9J+KlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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