Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56c13db3635cfee5141a9a1fca7969d7c1b86e3099c9d9dc69c9cf3ac82367f6' 
  AND token = '5X0jqnfftqpPf5vSCyUOPjFLnplIfiUa13R0+Qr2OXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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