Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2be21ffaee41cbcf0e0430d4a7b9b62ddee45523963a2cafc62ed536d120684' 
  AND token = 'pDjhi9zw1si2jLwYYEe9A0XF7Mwk4vq3xHv3x6M0p6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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