Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d2a9096cb8e8f78a1291a56c2b287e9b61d714f3952c0ab019c91c5f9b94af0' 
  AND token = 'MLmmbMrg0w0TigUbNnbhy2MyES3/exwEK5llRcDKc0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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