Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10128687ffe3d42d623d5addc61f922931334095ce3a7269ba091c230b20b141' 
  AND token = 'B9y7mSAyboOOl7abWvxT7lH5uY+wX2moYq6NXWNZj5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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