Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c4320fb073894b94280ad9b6bcc4a2e37f7e9c80fd10b127f85d5bd8ab8e349' 
  AND token = '8YhhHEqWfvglLeSeB8MtErZ4cC+2h4cV1P/6czu1hc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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