Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5f7a693c41aaa28ef38c18275dd718a3e9bd878913c99f2280b628bd4518d57' 
  AND token = 'w3xvbQkRbUBFKht5RZXABBV0xHUd/zeBNR79xnFQdUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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