Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd26308de3f81fe79e81fdec32dff1f5dfb888795d6a3e64b5306a53bd3c34d99' 
  AND token = '1PoGAN748a7B6o9ClnIBCxZTfNN6jNPo+ehfXpG+mqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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