Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8573b2206206abef3b99220b4526bbf2a8d4f0926bcf6eeb03a696a8aca5568f' 
  AND token = 'X6KgInsWwhedGfbAWScEqfkaj/YVnSsIONCLi5GUeSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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