Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66a7807c74ad534a09fcd95cc740e05640746271697b902f5dc4806259d74131' 
  AND token = '0MTYseRstaMlYxISS+MGqQUuUoBfRzlzKM15NMvq6NA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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