Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '357a4dfd6ee89fda162a5baf5bb19c4f5dc6c7227e878646c42ca1bccc21cb1a' 
  AND token = 'wUWP0kyBk2vSdyikStbUvbCJG0Px9rcGe6n6DVCXvY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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