Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a4b1ad1478bebe5957d085f0354eef289f83043af0cc7cacb1e6300a1283ee2' 
  AND token = 'geTh1z5SKlAZdjeOgn0H6YbgmtGiz8F1/EZOOpkyWas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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