Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3a32d1e5bf433ae186f88448bff429f228649ccc2fd54a89582e96f615227e5' 
  AND token = 'z3O7WMlD2NKr6ihZ9VpnRr9wnU59l6jPADYbhjMD7Zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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