Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd38ae25650621f97e9e5a214f801053f0b82d8d900eb21e8cacd028d77da2f6f' 
  AND token = 'xtCbsUFWvC/b3cGBEJit1a2RcjCZ4OTwipRMswE4UrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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