Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac3b97cc86e70ffd40238947c89e1d4087ea1ee591d0086e96a2c1386663a18' 
  AND token = '8gBxqVxh4GXRHs4sy0WMrWuOXGUr5rFvq4KOZ5xOU4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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