Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86e20d46df73efab9824ac623ad055990e8d8c7dc698c961916491fe15c05f69' 
  AND token = 'eKx/scMgGy2fJlFglbINs00xIqc9ji5f/T92Hwgmhx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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