Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f0edf7a67821b7216844c7674e9692d71a88ce647c2101753b3dc8bf2a2c897' 
  AND token = 'vIzPHd0LnS8SDZMsnyPJaZ7JcJ4WFKPqvAjb35KgQ9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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