Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34014edc0c6147d02962535bc639b95cf251a6085f8200c8865348161ad08340' 
  AND token = 'CRUFMScw/LAZKhuhNAmNNEYbKolVLK0/Zg/xmh51QyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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