Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8c48cbac83ebeb801348390f2fc92ea6384d128c390820bee767f61fb5970ad' 
  AND token = 'a+bJhGzVutXDZdnfotNIrlWoCawb8Zl00hGH4OHkwTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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