Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a0919abfc8ae4f6450437ff9403f042c675ffc2da2b6ded7ce5e27e642c017' 
  AND token = 'wj8qKEPGDBcwdTiJRysmorROFFXNYJJtod3yNERGZcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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