Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89b9e23fb6f695928e72a6918179ae21905ab03ed9d8c69ff226d54974794bd0' 
  AND token = 'R0zWPEdBw20QWvyb2vp9x6pcVvBmlNkKkzYqVUS9Rps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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