Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce2769696a6bc20d288a83d2532a79ea631200b4fec8446cc6c38973e3437dfc' 
  AND token = 'rFVuzwNE0BD4JN2deDhQumC50YOLuIwqnyK/M9uwy74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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