Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f54e5f4dc13bce3a17665a2a987384095b6b50072a1994a21c18c021d3cda9e7' 
  AND token = '1znoePxgwRudYw2hbXjDauZIeVl/oGg89SaWropi9A0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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