Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '714541ce1e8f50478a1aee53af19e3af6ae67cfa22869139ce0981983fae74c7' 
  AND token = 'Mcojdxy4tsZd1nM1BFZMsqjkoCnqrYs1Epgg0yE+6HY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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