Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd5a0c363e7f88bba5be0cfbb5812c024c201ad759867f6c1e567f76916d3858' 
  AND token = 'hIXxIuY575uhJEje1b+Vt7KiJCvvtjAhDH8FwnaYNNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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