Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f2d6332c4eecf488fba5a86863f4337d5a6351297c677c365ca433894b3b083' 
  AND token = 'FJXu6FN8FeUXAIMuW/ihUYj18oCpA+kz5+jOlLxkec8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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