Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a32a8d9ed83c8095cc6c2f4c6d053158068e5a9c59f4d2951776e5455521bdba' 
  AND token = 'GtdxFI4qdbuv648eWzw2RmH7RZfZC5WrZR+P+phJwFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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