SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '112eda887ff55647807f62b2026c8ef8475d24c2787171303a1a813fe629caea' 
  AND token = '4T0WRR3GdDK5GCKlb2/kuMKgYD9V4r21SHjJJOTUrhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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