Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1e996364776c1b1542bf04bb059da141267a3c231b71206d9449c565db4eaa1' 
  AND token = 'cjDpHpAF0O5Mv4R4IM271yk5esmb18nU9XvX1IYrThM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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