Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9af5c0d00c07bb422443caf79cc86ed7333d0168d67607a5f950faf89afc8656' 
  AND token = 'kCFSWcGuCyAf48GX0cloWoRD7jR7di+Gg49F5qWTANY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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