SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '794cd3f675c99a96192d4d127f5455573aece58bd4ab810c464b4c5ebdead88d' 
  AND token = 'ohgqqAw2e6j1PGEMMaQzZw/2qNuonbAq0ppir0IDgJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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