Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0db20782e6d336af95e8bd8534a2751820540814667cc7981919e46144620dd' 
  AND token = '8ha2T4aQD0C+U8929rZeHzmq97uuSJjrjVnOAP59+fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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