Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b9b1084a05873b1205dccc1b1fafd83725a87e121bf0316cf83b8b4997cd19a' 
  AND token = 'B4LM/oTvA6vjoXwIxF+onFYbIgnRoAvywiRkPRogBFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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