Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26757118247545c2c2a8388c77d67d89e1cee991813fd6492b2209ee8fa7a9fa' 
  AND token = 'OXhPQwQ8OywzDGjGbGN54yGpsR7EhlXCICK6zpob6Z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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