Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9bab7ede640502cad52855e6f0f4f0b057d6ee1f9b9dc23f0946ac11558bc17' 
  AND token = 'zdbULoKzGB5RrkOPuZJuUAestCAUzozEOwDGEY6nXTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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