SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62a7dc60e0f765ae7d2816f55fdc136ed7eaa7bcef399792da28ff31b2c96b94' 
  AND token = 'zYLC4VRqlbifXR28plBXfAuoauH4Yq/4KVwXz9PrOxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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