Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca5e771a7775bd850db2978c31d1b356ae4561dc649af62716f36105f2ed251e' 
  AND token = '4i8hb9tFcxJObfBYPHIHTGq8ZcmkK/Bn1PKQK9Kh7po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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