Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6fa1a1b67371c9f1870c4fb6caa1b2f59ec3cdfdb7d914c66a74242085678026' 
  AND token = 'E8B/4jfjRWp6Ztz8TIG6N8TF+CSzI7O63hyUmxM6ZEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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