Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b021343133f9eb110303810873a0a6bdf232f2edf0cd4436e69619af7905a04' 
  AND token = 'vr/nlZSYnTiLCsIuoWcvt2nIsu82uGdR01N0EseoZvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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