Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71f61c7eac7d0b9bd5aac9eea6db47af3a0cda1d66b032c0e6e03a5063d90d7b' 
  AND token = 'cfEOKypa3F6iIotkNlh/IxYa6ZtXLlDT+FN6kl8aKeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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