Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28e92fc4f623422ecf4fd02d2ffffe640c807ce56ab4865b5fac37950cab030f' 
  AND token = 'GYyegb4jyEEvZ7x2fyozw1mMBdNrdjn5/3W+2s8dyFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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