SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d5adb59a6bc1639084e735fddcc18c19ff3b162c2e77741e8118294a9dd9356' 
  AND token = 'gy4Pv/i7GVgUquFQ24ICrhExQEpJEQNcC61/kC6++kU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}