Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '86ebb5c88f8826eb44a89c6e8dc2c67bfec07a622c1feb4c31b555cb2d7b90ac' 
  AND token = 'wmml0mWuV/1ryu3FRmYak5kXXzooGJL7WKWG4fwdehM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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