Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1373be95f6010ddce7bbabf5c3969d020047a8a89e98b9d76d4a12ed044a261' 
  AND token = 'J/3fl3W7g7E43L4dy3uYGsVbSs/jnjM5Gp8FL+utKxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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