Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03f37efca82d0c974bf7c8f1853f75cfdf0e76873324c6f8555fdb30d78c26c4' 
  AND token = '2y+jYuvVEGzShf2w6F9kd6zj2443BWURdbDCo4quOB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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