SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd24f5425d6cc8f146b9d1f94dcc0caf637b150d27b1624963e8c4f05e95af3f4' 
  AND token = 'boHQFtGizpWSHYliWbLC1imPqMkZIowIDVzzo81Fd7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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