Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ec550b239499c43c9133f979008d793e59dd4323c45fb27b7ed47831e42cf7c' 
  AND token = 'lHo8em7BJX7PvNKwmeY0XqxFvXIFw2UtE7+DLWuISEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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