Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f204754093f4e7330b16c181178a7a3b559210348566fb88b0f309ecb1610b4' 
  AND token = 'Sfn0qeIln+Eqwo94wW13a3T1WKzQCmdf2RNJNMscdok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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