Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a82d1f854a91e7c619708d9321e6c4d7abc15c91ea3cf8ce880953d2902fd41' 
  AND token = 'C19DZqzuRCvK1r8cimRuyVPBYVMeUMud1OeanyaVb2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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