Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85abdf37c9195c2f66edc176625800b231fe7bf1644135be09b5c523be526583' 
  AND token = 'Z525LavZtaKy7NJc/GvColtLu5RSOqdoXl6mLRM+tdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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