Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee3bd32168bb7a37d1ca059b399c9f837e6b6011339938b81fb08418000d4577' 
  AND token = 'JpqaaMdyxQ7LQGVQQMBKsyZZRxzn2bVGFQahW5cB7DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}