Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93c98f1963fbb103975188eb76c003bb1aa1d43f9da3b2ad61fd66ee074b318f' 
  AND token = 'F9OIH5B80AwpKZ5n84I3KDHBoEfRUvZ8XaVHgI22PB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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