Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e3b68103d82185618dacebc67ec56a4f07330172a68376bba3fc284add2ffd9' 
  AND token = 'ttH8iRBredzOzkMC6WeuN1OyLwIRZog0LDk03+J3SHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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