Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbc1f383273e885e20777f429b78501ceca17a01c1337f72403a1d4a7c9b3678' 
  AND token = 'tzlmiSDBfuNLRr7s+2x8TNKNxty6rbUmfT30vcZSbd8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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