Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '519930fe8c06bb10f360c41e7f567bdd44812af13e39e44445702e764e4369b1' 
  AND token = 'EFbmIWWHgukA2CJOje4c8F9pbrUtMzl7p2IDhmfnZew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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