Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8d63d8db52e7b29ef813bfe2a90f2260de31a1f6ffd5e7c3f791cc74bcddf1' 
  AND token = 'hAGhGsauyw1pk9tysj0ZqQQ6plrAYxVA93VBn0ky15Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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