Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b64a024bc3e96f61ae22ad39b8c1ebbdd02f3aeb6308cc4aaf7c891577a97824' 
  AND token = 'zkzH63vw6Qs42kqviurmfnBeEkXC6FGZayjswC6Eh/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}