SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1b79b8b0ac43a0f9f62f189fa35cd93c39417575fdf24317e31161f896092cd' 
  AND token = 'XEUDW3Zr/Xii0AO2RGcKyDO9N2x24Ggx6wVgBK/R4WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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