Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d977ca08e4d7adc01594c6ecfde3f0fbe9e6d02943a0aceb8b093697b928d44' 
  AND token = 'efvrIP6AMJFoo7Cxmqy1iV8zPMyqza9sZc6excai46o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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