Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13b9152f347b90902755f3e61d880165382688019eb119a6bdcbbb2f4ec1cd2e' 
  AND token = 'pHSNLlj3NvIpk5ivdTWfuuHiHx/RwCQtnlR3vYd6I8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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