Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898ac91dbac1363a92b9fc3c55d1454241cd92cf6efed16a06039c33f44c34e6' 
  AND token = 'YeceJ6gngFQXaQfcWGSokayx+YwzpO6NYJ5mM7C8E8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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