Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b56c9471f7b420033978dd61128762ce6ee1c3e60aac59e5cd319c958118751' 
  AND token = 'ZVo/Hlr4u2HdID6ymhFgyNZOTKRcpZQ2s29KRq5I8WA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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