Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61611273be2aabae7fea599071deaee90650a67791187bc2215b631f81180225' 
  AND token = 'Cmy2MYUWqcKIVCIEAlMjSDiTVOLt00i1ZoJlF+DRuKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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