Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85cd30cabde5fffdf003da11942d9a0c64c71e41448cb3130a8d1d62eaf5690' 
  AND token = 'CNRT1QqzAI2a9cw6gegzJebdsnQ3tVvRZmm7YZhkDgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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