Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '983db8d4d8cf7e118ea92197a5953a9d33492da90d92bc6fec836baee0563724' 
  AND token = 'HdpkDboCpLekgZSitWZLw0Bwl2zrZqH5bwO48EGVTOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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