Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '329056c6fd5c21b50d81c2ac32771b4d783cb052d6a5f2edda5d252e49aa24fe' 
  AND token = '7R3TLxEAvvkETvJDVE+Ii7bDWHHfPfmJR2AUENf5Vw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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