Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07aeff635ddaf2de3ab5a0778bbea896527f141f0c9f03b4bec7f6836ce1bd3c' 
  AND token = 'DMmqYU1jyWbV0Ol00QEdBRH1whJGAVpyoiXhRu5TPCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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