Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56d9a54cd68919a198eaf751239e7363a8dd8a9296e8f3150ff60f06fc99a10e' 
  AND token = 'H1laUQu7EJT3K+U269sj3kPAb9jr0ukU6nAHEHDjux0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}