Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d809a727f04f14d8190ebf572d0e59bafb953b7a55731dfee29af66b6804a31' 
  AND token = 'X62AjnuCaPZ69VDfLGJpHMyx0cowtH8pWGlMe15sEjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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