Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5fc7e4c93b9c7befbc20291e6a8c8ee3c05eafbcc6a8ed9c9652d4f4c823b28' 
  AND token = '01p/e+1n3KsGIlDKxaEV0+kZ66rQpEMPUqxV9YdVpaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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