Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd827ec4a01f037f9f110cc67dfc4ebb854a557d56dbdcb2cf1553c7bddf62098' 
  AND token = '2Hg6T9T/v1MINoltmwQLUXdJ3cBEy/xvzxMtexmOEgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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