Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f34b84ff812728e35564154d5fc3b79cae6d2a782ed3ac15746e014cc1ed9a6' 
  AND token = '4IzFWPa77flNiYp2fXVtla6f6sSIBvMll3G/AKwjHw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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