Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b71279378f366c0788172b49f2cd5f10c106e166bf471e3daf02e47ed1e172' 
  AND token = 'u/KlIIlUAsxEds70i1S4ybffgs66O3ZljJs+O0zAZ90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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