Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36daa48bdf04e45e2fa85fdf8cb7bd0b6541d87ad68ce733628c804f27bfc259' 
  AND token = 'nk/czZxyk8d2z5a/QIuDeeYVW/BvVBpywoyGSuln/RI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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