Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3af64bb3812a1772f7180a615735acf6970b0c017c7470ddfcb853f0cfbd18aa' 
  AND token = 'tXnG5gw/Rr8kf9lyaLvlLO64MkGAauV+XKEY8yexWZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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