Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0af6008e11b6c55157af969b89707b577f4f7f961eef02dab68790a76bfe503' 
  AND token = 'lmtA4Qf0t77fh+fXoIo6OBfVbfepWjQ2r6AK2OmQVnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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