SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98c7abbf7b9818d71c14c4bb551ad4d2673765158236583641e6f0751b290227' 
  AND token = 'tYFyBKuRwLvuex3Zra2OO573gz40F/PCBUCwA6sBGB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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