Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d47c358e10b246c7cf46f585de6277af7d5341c3c4f0b425e4de16efb6b980b' 
  AND token = 'OpSsUdPUe4DJSUbUynjxGxhh5V9R582hXJwUA+VsqYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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