SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7774f482634ee91f1aa46fa5ddcd6fb7bd9c13338e539e6a81b574f187338e4e' 
  AND token = 'Yo80vOihj7uv2oiZmHYm7Q+7Ik77JquOYlU2hbDByWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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