Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44a25ff79a0f86c420a665ccd8df4821267817dbcb7fe37b61a1d50d7c935f8b' 
  AND token = 'uivHXCMLWtKiaq2dm1Zh2fztaftr+FFO3O3eRBZxtUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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