Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e959f3bfcf5807c5e1d4c963b8937b89db1b04e7111a6fedc51f9c74e5f7043e' 
  AND token = 'NsTJTVQBD31EMAL0vf3SfBpqXi0w3RSJGbac7oYw9ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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