Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7be3f1b9f28e99eec4c2bbab75e78207059d4ae66a665e8d08ebb6ce4642f8bf' 
  AND token = '8p5bKoDdz3OleHrQ5CvftKc49Tr+YL02RBCupFoj460=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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