Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '523bcef2d65a0717ff4830aef4fc4b978a0bcc0303faa65d69969747036a1407' 
  AND token = 'D21tzTl810z2HI8trjmwu4gT6LOv+nD7FA0DOp9EHc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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