Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82ab7101599a51e91c2ff5c3c478fc4ea194fb10843dfbba33f4d7791cbdcf9e' 
  AND token = 'm21r/vcPj2hhyOOvFq/Wwr07GbjaA+O5CYnyg9bJEWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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