SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cb7508b675b66c6d2c2af533f2b93fea779c5fea12caff78921af077333af26a' 
  AND token = 'kbrPcXqBKXH+w+ykBvTqSp3Z8Kwk/FHJQBlYL9EDTis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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