Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a14da5ac6fa4aacb4b6b5a04d000a965e509fcc2d71b234529f4572c84ab1c66' 
  AND token = 'Dz6rI87LbqJYDFxasEzf+8nJB48coLdjAd3Mw4XkULw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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