Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b5a7cb3984d064ae8cdb48d6aa43ecadf26f508890e9eea0d273c6a4a350f01' 
  AND token = 'hqt9nk4z6QxjSOeGX777G4NAf+W1XUasW+1nHny1KZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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