Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56a6928026d21ea62740cf48387ece01f82c0b7b2f4c344e27e1509a9b41f338' 
  AND token = 'wXVbOoFRUfqwHmU7111DK7mkldBEeU7lMQ2nH49vSrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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