Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ba6eb65cad02a4dbf0a078d1da66dde6f05ee90c48cafc3e9ae0c683d3b3f02' 
  AND token = 'AaGwX4/NxPx8TwCazDaMBUuaDeg+8Oxry6+b54O8pQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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