Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc9ebaff9cceb4cd0a6df596f707eb1f6dab0c3c6d47278ab1f4fbb1deca9cd2' 
  AND token = 'hD4EsImfG+TKgrN1v9xGXDzbvmTTGinyinfDqYmHby4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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