Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b98bfd8e73192e795433eefcf0c283bc8efbfc43b3f8e28994dd4df640e4eb3' 
  AND token = 'acyqvdp3KsEFEtzZaKyzh6t08H3Gegh3+C6PDYJxne0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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