Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '721f4d93e9ab00c64aad17fec5d23ab5e5ccb4314ed30e89073342aa58ab0cee' 
  AND token = 'y4NuadU2Bi/AuppPaITZ4X8IaHRsEkmSOHrenAdem1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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