Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc0ae2334b51ffe7543e7f7fdf642367214b7cf8a41c4d99bbeaa633b85e14cb' 
  AND token = '3k9GCX8PVEwYHYUhs3SXZs5gfMkale1PJr5d+2vW57c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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