Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b86e2bbc05f6f6141e05895cdafd804f22082d1e5cd2663984c8d95176a97b52' 
  AND token = 'GXt1UvzsB5t6YgHcGqQfT59RWf5UvL6hlf0SDLd9oqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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