Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4035be396beb4ab480b9adef9f02eac3c945805ae9b9cd0f231d3b7f72a873ed' 
  AND token = 'CThbaLh1yxZ3n+brPpw+8hfTj7F6rXED+opXuqushGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}