Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67f812f82ceb3df7521cfd26cd35c0e014cf912cfbd915eed992188203d27de2' 
  AND token = '+k7SrMd2/5R7c9MSV7DVOtTBmO9NPwYwQFauh5FTAbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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