Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f553f17ce73875f6d5b908bf36b697d5138b29c06519f20f0aa264db96b75f9' 
  AND token = '5dAMXW1H1HsS0pQ2tcqn/jUcgD7gixMickH2PncRrHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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