Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '290e6a65dbb86633a27b3493cc942ef7454f57c482b0aedbbc36c56e08711f35' 
  AND token = 'kRkl1KIhCPepsV273Vsonu2hnI0MG3dzl6E0KKeiV04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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